Add performance example

10 files changed, 643 insertions, 1 deletions

diff --git a/examples/makefile b/examples/makefile
index 339dae9..8cd8a21 100644
--- a/examples/makefile
+++ b/examples/makefile
@@ -4,7 +4,7 @@
 
 include $(dir $(lastword $(MAKEFILE_LIST)))../build/bootstrap.make
 
-examples := roundtrip
+examples := roundtrip performance
 
 default   := $(out_base)/
 test      := $(out_base)/.test
diff --git a/examples/performance/README b/examples/performance/README
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/examples/performance/README
diff --git a/examples/performance/driver.cxx b/examples/performance/driver.cxx
new file mode 100644
index 0000000..7d096d6
--- /dev/null
+++ b/examples/performance/driver.cxx
@@ -0,0 +1,138 @@
+// file      : examples/performance/driver.cxx
+// copyright : not copyrighted - public domain
+
+#include <string>
+#include <fstream>
+#include <iostream>
+
+#include <xml/parser.hxx>
+
+#include "time.hxx"
+
+using namespace std;
+using namespace xml;
+
+const unsigned long iterations = 1000;
+
+int
+main (int argc, char* argv[])
+{
+  if (argc != 2)
+  {
+    cerr << "usage: " << argv[0] << " <xml-file>" << endl;
+    return 1;
+  }
+
+  try
+  {
+    ifstream ifs;
+    ifs.exceptions (ios_base::failbit);
+    ifs.open (argv[1], ios::in | ios::ate);
+
+    size_t size (ifs.tellg ());
+    ifs.seekg (0, ios::beg);
+
+    char* buf = new char[size];
+    ifs.read (buf, size);
+
+    cerr << "  document size:  " << size << " bytes" << endl;
+
+    unsigned long start_count;
+    unsigned long end_count;
+
+    // Warmup.
+    //
+    for (unsigned long i (0); i < 10; ++i)
+    {
+      start_count = 0;
+      end_count = 0;
+
+      // Configure the parser to receive attributes as events without
+      // creating the attribute map.
+      //
+      parser p (buf,
+                size,
+                argv[1],
+                parser::receive_default | parser::receive_attributes_event);
+
+      for (parser::event_type e (p.next ()); e != parser::eof; e = p.next ())
+      {
+        switch (e)
+        {
+        case parser::start_element:
+          start_count++;
+          break;
+        case parser::end_element:
+          end_count++;
+          break;
+        default:
+          break;
+        }
+      }
+    }
+
+    cerr << "  elements:       " << start_count << endl;
+
+    os::time start;
+
+    for (unsigned long i (0); i < iterations; ++i)
+    {
+      start_count = 0;
+      end_count = 0;
+
+      // Configure the parser to receive attributes as events without
+      // creating the attribute map.
+      //
+      parser p (buf,
+                size,
+                argv[1],
+                parser::receive_default | parser::receive_attributes_event);
+
+      for (parser::event_type e (p.next ()); e != parser::eof; e = p.next ())
+      {
+        switch (e)
+        {
+        case parser::start_element:
+          start_count++;
+          break;
+        case parser::end_element:
+          end_count++;
+          break;
+        default:
+          break;
+        }
+      }
+    }
+
+    os::time end;
+
+    delete[] buf;
+
+    os::time time (end - start);
+    double ms (
+      static_cast<double> (
+        time.sec () * 1000000ULL + time.nsec () / 1000ULL));
+
+    cerr << "  time:           " << time << " sec" << endl;
+
+    // Calculate throughput in documents/sec.
+    //
+    double tpd ((iterations / ms) * 1000000);
+    cerr << "  throughput:     " << tpd << " documents/sec" << endl;
+
+    // Calculate throughput in MBytes/sec.
+    //
+    double tpb (((size * iterations) / ms) * 1000000/(1024*1024));
+    cerr << "  throughput:     " << tpb << " MBytes/sec" << endl;
+  }
+  catch (const ios_base::failure&)
+  {
+    cerr << "io failure" << endl;
+    return 1;
+  }
+  catch (const xml::exception& e)
+  {
+    cerr << e.what () << endl;
+    return 1;
+  }
+}
diff --git a/examples/performance/expat.cxx b/examples/performance/expat.cxx
new file mode 100644
index 0000000..411685f
--- /dev/null
+++ b/examples/performance/expat.cxx
@@ -0,0 +1,132 @@
+// file      : examples/performance/expat.cxx
+// license   : not copyrighted - public domain
+
+#include <iostream>
+#include <fstream>
+
+#include <expat.h>
+
+#include "time.hxx"
+
+using namespace std;
+
+const unsigned long iterations = 1000;
+
+unsigned long start_count;
+unsigned long end_count;
+
+void XMLCALL
+start_element (void* data, const XML_Char* ns_name, const XML_Char** atts)
+{
+  start_count++;
+}
+
+void XMLCALL
+end_element (void* data, const XML_Char* ns_name)
+{
+  end_count++;
+}
+
+void XMLCALL
+characters (void* data, const XML_Char* s, int n)
+{
+}
+
+int
+main (int argc, char* argv[])
+{
+  if (argc != 2)
+  {
+    cerr << "usage: " << argv[0] << " <xml-file>" << endl;
+    return 1;
+  }
+
+  try
+  {
+    ifstream ifs;
+    ifs.exceptions (ios_base::failbit);
+    ifs.open (argv[1], ios::in | ios::ate);
+
+    size_t size (ifs.tellg ());
+    ifs.seekg (0, ios::beg);
+
+    char* buf = new char[size];
+    ifs.read (buf, size);
+
+    cerr << "  document size:  " << size << " bytes" << endl;
+
+    // Warmup.
+    //
+    bool failed (false);
+    for (unsigned long i (0); !failed && i < 10; ++i)
+    {
+      start_count = 0;
+      end_count = 0;
+
+      XML_Parser p (XML_ParserCreateNS (0, ' '));
+      XML_SetStartElementHandler (p, start_element);
+      XML_SetEndElementHandler (p, end_element);
+      XML_SetCharacterDataHandler (p, characters);
+      XML_Parse (p, buf, size, 1);
+      XML_ParserFree (p);
+
+      if (start_count != end_count)
+        failed = true;
+    }
+
+    if (failed)
+    {
+      cerr << "failed" << endl;
+      return 1;
+    }
+
+    cerr << "  elements:       " << start_count << endl;
+
+    os::time start;
+
+    for (unsigned long i (0); !failed && i < 1000; ++i)
+    {
+      start_count = 0;
+      end_count = 0;
+
+      XML_Parser p (XML_ParserCreateNS (0, ' '));
+      XML_SetStartElementHandler (p, start_element);
+      XML_SetEndElementHandler (p, end_element);
+      XML_SetCharacterDataHandler (p, characters);
+      XML_Parse (p, buf, size, 1);
+      XML_ParserFree (p);
+
+      if (start_count != end_count)
+        failed = true;
+    }
+
+    os::time end;
+    delete[] buf;
+
+    if (failed)
+    {
+      cerr << "failed" << endl;
+      return 1;
+    }
+
+    os::time time (end - start);
+    double ms (time.sec () * 1000000ULL + time.nsec () / 1000ULL);
+
+    cerr << "  time:           " << time << " sec" << endl;
+
+    // Calculate throughput in documents/sec.
+    //
+    double tpd ((iterations / ms) * 1000000);
+    cerr << "  throughput:     " << tpd << " documents/sec" << endl;
+
+    // Calculate throughput in MBytes/sec.
+    //
+    double tpb (((size * iterations) / ms) * 1000000/(1024*1024));
+    cerr << "  throughput:     " << tpb << " MBytes/sec" << endl;
+  }
+  catch (ios_base::failure const&)
+  {
+    cerr << "io failure" << endl;
+    return 1;
+  }
+}
diff --git a/examples/performance/gen.cxx b/examples/performance/gen.cxx
new file mode 100644
index 0000000..b6392c0
--- /dev/null
+++ b/examples/performance/gen.cxx
@@ -0,0 +1,76 @@
+#include <fstream>
+#include <sstream>
+#include <iostream>
+
+using namespace std;
+
+static const char* enums[] =
+{
+  "romance",
+  "fiction",
+  "horror",
+  "history",
+  "philosophy"
+};
+
+int
+main (int argc, char* argv[])
+{
+  if (argc != 3)
+  {
+    cerr << "usage: " << argv[0] << " <count> <output-file>" << endl;
+    return 1;
+  }
+
+  unsigned long n (0);
+  istringstream is (argv[1]);
+  is >> n;
+
+  if (n == 0)
+  {
+    cerr << "record count argument should be a positive number" << endl;
+    return 1;
+  }
+
+  ofstream ofs (argv[2]);
+
+  if (!ofs.is_open ())
+  {
+    cerr << "unable to open '" << argv[2] << "' in write mode" << endl;
+    return 1;
+  }
+
+  ofs << "<t:root xmlns:t='test' " <<
+    "xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' " <<
+    "xsi:schemaLocation='test test.xsd'>";
+
+  unsigned short ch (1), en (0);
+
+  for (unsigned long i (0); i < n; ++i)
+  {
+    ofs << "<record orange=\"" << i << "\"";
+
+    if (i % 2 == 0)
+      ofs << " apple=\"true\"";
+
+    ofs << ">"
+        << "<int>42</int>"
+        << "<double>42345.4232</double>"
+        << "<name>name123_45</name>";
+
+    if (i % 2 == 1)
+      ofs << "<string>one two three</string>";
+
+    ofs << "<choice" << ch << ">" << ch << " choice</choice" << ch << ">"
+        << "<enum>" << enums[en] << "</enum>"
+        << "</record>";
+
+    if (++ch > 4)
+      ch = 1;
+
+    if (++en > 4)
+      en = 0;
+  }
+
+  ofs << "</t:root>";
+}
diff --git a/examples/performance/makefile b/examples/performance/makefile
new file mode 100644
index 0000000..da4bf80
--- /dev/null
+++ b/examples/performance/makefile
@@ -0,0 +1,90 @@
+# file      : examples/performance/makefile
+# copyright : Copyright (c) 2013-2014 Code Synthesis Tools CC
+# license   : MIT; see accompanying LICENSE file
+
+include $(dir $(lastword $(MAKEFILE_LIST)))../../build/bootstrap.make
+
+cxx_tun := driver.cxx time.cxx
+
+cxx_obj  := $(addprefix $(out_base)/,$(cxx_tun:.cxx=.o))
+cxx_od   := $(cxx_obj:.o=.o.d)
+
+studxml.l             := $(out_root)/xml/studxml.l
+studxml.l.cpp-options := $(out_root)/xml/studxml.l.cpp-options
+
+driver   := $(out_base)/driver
+test     := $(out_base)/.test
+dist     := $(out_base)/.dist
+clean    := $(out_base)/.clean
+
+# Build.
+#
+$(driver): $(cxx_obj) $(studxml.l)
+$(cxx_obj) $(cxx_od): $(studxml.l.cpp-options)
+
+$(call include-dep,$(cxx_od))
+
+# Alias for default target.
+#
+$(out_base)/: $(driver)
+
+# Dist
+#
+$(dist): name := $(subst $(src_root)/examples/,,$(src_base))
+$(dist): sources := $(cxx_tun)
+$(dist): extras := README gen.cxx expat.cxx test.xsd test-50k.xml
+$(dist): export extra_sources := $(filter-out driver.cxx,$(cxx_tun))
+$(dist): export extra_headers := time.hxx
+$(dist): export extra_dist := $(extras) $(name)-vc9.vcproj \
+$(name)-vc10.vcxproj $(name)-vc10.vcxproj.filters \
+$(name)-vc11.vcxproj $(name)-vc11.vcxproj.filters \
+$(name)-vc12.vcxproj $(name)-vc12.vcxproj.filters 
+$(dist):
+	$(call dist-data,$(sources) $(extra_headers) $(extras))
+	$(call meta-automake,../template/Makefile.am)
+	$(call meta-vc9proj,../template/template-vc9.vcproj,$(name)-vc9.vcproj)
+	$(call meta-vc10proj,../template/template-vc10.vcxproj,$(name)-vc10.vcxproj)
+	$(call meta-vc11proj,../template/template-vc11.vcxproj,$(name)-vc11.vcxproj)
+	$(call meta-vc12proj,../template/template-vc12.vcxproj,$(name)-vc12.vcxproj)
+
+# Test.
+#
+$(test): $(driver)
+	$(call message,test $<,$< $(src_base)/test-50k.xml)
+
+# Clean.
+#
+$(clean):                            \
+  $(driver).o.clean                  \
+  $(addsuffix .cxx.clean,$(cxx_obj)) \
+  $(addsuffix .cxx.clean,$(cxx_od))
+
+
+# Generated .gitignore.
+#
+ifeq ($(out_base),$(src_base))
+$(driver): | $(out_base)/.gitignore
+
+$(out_base)/.gitignore: files := driver
+$(clean): $(out_base)/.gitignore.clean
+
+$(call include,$(bld_root)/git/gitignore.make)
+endif
+
+
+# How to.
+#
+$(call include,$(bld_root)/dist.make)
+$(call include,$(bld_root)/meta/vc9proj.make)
+$(call include,$(bld_root)/meta/vc10proj.make)
+$(call include,$(bld_root)/meta/vc11proj.make)
+$(call include,$(bld_root)/meta/vc12proj.make)
+$(call include,$(bld_root)/meta/automake.make)
+
+$(call include,$(bld_root)/cxx/o-e.make)
+$(call include,$(bld_root)/cxx/cxx-o.make)
+$(call include,$(bld_root)/cxx/cxx-d.make)
+
+# Dependencies.
+#
+$(call import,$(src_root)/xml/makefile)
diff --git a/examples/performance/test-50k.xml b/examples/performance/test-50k.xml
new file mode 100644
index 0000000..42e22f3
--- /dev/null
+++ b/examples/performance/test-50k.xml
@@ -0,0 +1 @@
+<t:root xmlns:t='test' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xsi:schemaLocation='test test.xsd'><record orange="0" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice1>1 choice</choice1><enum>romance</enum></record><record orange="1"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice2>2 choice</choice2><enum>fiction</enum></record><record orange="2" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice3>3 choice</choice3><enum>horror</enum></record><record orange="3"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice4>4 choice</choice4><enum>history</enum></record><record orange="4" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice1>1 choice</choice1><enum>philosophy</enum></record><record orange="5"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice2>2 choice</choice2><enum>romance</enum></record><record orange="6" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice3>3 choice</choice3><enum>fiction</enum></record><record orange="7"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice4>4 choice</choice4><enum>horror</enum></record><record orange="8" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice1>1 choice</choice1><enum>history</enum></record><record orange="9"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice2>2 choice</choice2><enum>philosophy</enum></record><record orange="10" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice3>3 choice</choice3><enum>romance</enum></record><record orange="11"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice4>4 choice</choice4><enum>fiction</enum></record><record orange="12" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice1>1 choice</choice1><enum>horror</enum></record><record orange="13"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice2>2 choice</choice2><enum>history</enum></record><record orange="14" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice3>3 choice</choice3><enum>philosophy</enum></record><record orange="15"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice4>4 choice</choice4><enum>romance</enum></record><record orange="16" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice1>1 choice</choice1><enum>fiction</enum></record><record orange="17"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice2>2 choice</choice2><enum>horror</enum></record><record orange="18" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice3>3 choice</choice3><enum>history</enum></record><record orange="19"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice4>4 choice</choice4><enum>philosophy</enum></record><record orange="20" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice1>1 choice</choice1><enum>romance</enum></record><record orange="21"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice2>2 choice</choice2><enum>fiction</enum></record><record orange="22" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice3>3 choice</choice3><enum>horror</enum></record><record orange="23"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice4>4 choice</choice4><enum>history</enum></record><record orange="24" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice1>1 choice</choice1><enum>philosophy</enum></record><record orange="25"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice2>2 choice</choice2><enum>romance</enum></record><record orange="26" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice3>3 choice</choice3><enum>fiction</enum></record><record orange="27"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice4>4 choice</choice4><enum>horror</enum></record><record orange="28" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice1>1 choice</choice1><enum>history</enum></record><record orange="29"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice2>2 choice</choice2><enum>philosophy</enum></record><record orange="30" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice3>3 choice</choice3><enum>romance</enum></record><record orange="31"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice4>4 choice</choice4><enum>fiction</enum></record><record orange="32" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice1>1 choice</choice1><enum>horror</enum></record><record orange="33"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice2>2 choice</choice2><enum>history</enum></record><record orange="34" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice3>3 choice</choice3><enum>philosophy</enum></record><record orange="35"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice4>4 choice</choice4><enum>romance</enum></record><record orange="36" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice1>1 choice</choice1><enum>fiction</enum></record><record orange="37"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice2>2 choice</choice2><enum>horror</enum></record><record orange="38" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice3>3 choice</choice3><enum>history</enum></record><record orange="39"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice4>4 choice</choice4><enum>philosophy</enum></record><record orange="40" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice1>1 choice</choice1><enum>romance</enum></record><record orange="41"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice2>2 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choice</choice4><enum>fiction</enum></record><record orange="192" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice1>1 choice</choice1><enum>horror</enum></record><record orange="193"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice2>2 choice</choice2><enum>history</enum></record><record orange="194" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice3>3 choice</choice3><enum>philosophy</enum></record><record orange="195"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice4>4 choice</choice4><enum>romance</enum></record><record orange="196" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice1>1 choice</choice1><enum>fiction</enum></record><record orange="197"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice2>2 choice</choice2><enum>horror</enum></record><record orange="198" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice3>3 choice</choice3><enum>history</enum></record><record orange="199"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice4>4 choice</choice4><enum>philosophy</enum></record><record orange="200" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice1>1 choice</choice1><enum>romance</enum></record><record orange="201"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice2>2 choice</choice2><enum>fiction</enum></record><record orange="202" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice3>3 choice</choice3><enum>horror</enum></record><record orange="203"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice4>4 choice</choice4><enum>history</enum></record><record orange="204" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice1>1 choice</choice1><enum>philosophy</enum></record><record orange="205"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice2>2 choice</choice2><enum>romance</enum></record><record orange="206" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice3>3 choice</choice3><enum>fiction</enum></record><record orange="207"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice4>4 choice</choice4><enum>horror</enum></record><record orange="208" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice1>1 choice</choice1><enum>history</enum></record><record orange="209"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice2>2 choice</choice2><enum>philosophy</enum></record><record orange="210" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice3>3 choice</choice3><enum>romance</enum></record><record orange="211"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice4>4 choice</choice4><enum>fiction</enum></record><record orange="212" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice1>1 choice</choice1><enum>horror</enum></record><record orange="213"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice2>2 choice</choice2><enum>history</enum></record><record orange="214" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice3>3 choice</choice3><enum>philosophy</enum></record><record orange="215"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice4>4 choice</choice4><enum>romance</enum></record><record orange="216" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice1>1 choice</choice1><enum>fiction</enum></record><record orange="217"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice2>2 choice</choice2><enum>horror</enum></record><record orange="218" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice3>3 choice</choice3><enum>history</enum></record><record orange="219"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice4>4 choice</choice4><enum>philosophy</enum></record><record orange="220" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice1>1 choice</choice1><enum>romance</enum></record><record orange="221"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice2>2 choice</choice2><enum>fiction</enum></record><record orange="222" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice3>3 choice</choice3><enum>horror</enum></record><record orange="223"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice4>4 choice</choice4><enum>history</enum></record><record orange="224" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice1>1 choice</choice1><enum>philosophy</enum></record><record orange="225"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice2>2 choice</choice2><enum>romance</enum></record><record orange="226" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice3>3 choice</choice3><enum>fiction</enum></record><record orange="227"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice4>4 choice</choice4><enum>horror</enum></record><record orange="228" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice1>1 choice</choice1><enum>history</enum></record><record orange="229"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice2>2 choice</choice2><enum>philosophy</enum></record><record orange="230" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice3>3 choice</choice3><enum>romance</enum></record><record orange="231"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice4>4 choice</choice4><enum>fiction</enum></record><record orange="232" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice1>1 choice</choice1><enum>horror</enum></record><record orange="233"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice2>2 choice</choice2><enum>history</enum></record><record orange="234" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice3>3 choice</choice3><enum>philosophy</enum></record><record orange="235"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice4>4 choice</choice4><enum>romance</enum></record><record orange="236" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice1>1 choice</choice1><enum>fiction</enum></record><record orange="237"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice2>2 choice</choice2><enum>horror</enum></record><record orange="238" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice3>3 choice</choice3><enum>history</enum></record><record orange="239"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice4>4 choice</choice4><enum>philosophy</enum></record><record orange="240" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice1>1 choice</choice1><enum>romance</enum></record><record orange="241"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice2>2 choice</choice2><enum>fiction</enum></record><record orange="242" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice3>3 choice</choice3><enum>horror</enum></record><record orange="243"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice4>4 choice</choice4><enum>history</enum></record><record orange="244" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice1>1 choice</choice1><enum>philosophy</enum></record><record orange="245"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice2>2 choice</choice2><enum>romance</enum></record><record orange="246" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice3>3 choice</choice3><enum>fiction</enum></record><record orange="247"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice4>4 choice</choice4><enum>horror</enum></record><record orange="248" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice1>1 choice</choice1><enum>history</enum></record><record orange="249"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice2>2 choice</choice2><enum>philosophy</enum></record><record orange="250" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice3>3 choice</choice3><enum>romance</enum></record><record orange="251"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice4>4 choice</choice4><enum>fiction</enum></record><record orange="252" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice1>1 choice</choice1><enum>horror</enum></record><record orange="253"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice2>2 choice</choice2><enum>history</enum></record><record orange="254" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice3>3 choice</choice3><enum>philosophy</enum></record><record orange="255"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice4>4 choice</choice4><enum>romance</enum></record><record orange="256" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice1>1 choice</choice1><enum>fiction</enum></record><record orange="257"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice2>2 choice</choice2><enum>horror</enum></record><record orange="258" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice3>3 choice</choice3><enum>history</enum></record><record orange="259"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice4>4 choice</choice4><enum>philosophy</enum></record><record orange="260" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice1>1 choice</choice1><enum>romance</enum></record><record orange="261"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice2>2 choice</choice2><enum>fiction</enum></record><record orange="262" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice3>3 choice</choice3><enum>horror</enum></record><record orange="263"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice4>4 choice</choice4><enum>history</enum></record><record orange="264" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice1>1 choice</choice1><enum>philosophy</enum></record><record orange="265"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice2>2 choice</choice2><enum>romance</enum></record><record orange="266" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice3>3 choice</choice3><enum>fiction</enum></record><record orange="267"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice4>4 choice</choice4><enum>horror</enum></record><record orange="268" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice1>1 choice</choice1><enum>history</enum></record><record orange="269"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice2>2 choice</choice2><enum>philosophy</enum></record><record orange="270" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice3>3 choice</choice3><enum>romance</enum></record><record orange="271"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice4>4 choice</choice4><enum>fiction</enum></record><record orange="272" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice1>1 choice</choice1><enum>horror</enum></record><record orange="273"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice2>2 choice</choice2><enum>history</enum></record><record orange="274" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice3>3 choice</choice3><enum>philosophy</enum></record><record orange="275"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice4>4 choice</choice4><enum>romance</enum></record><record orange="276" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice1>1 choice</choice1><enum>fiction</enum></record><record orange="277"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice2>2 choice</choice2><enum>horror</enum></record><record orange="278" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice3>3 choice</choice3><enum>history</enum></record><record orange="279"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice4>4 choice</choice4><enum>philosophy</enum></record><record orange="280" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice1>1 choice</choice1><enum>romance</enum></record><record orange="281"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice2>2 choice</choice2><enum>fiction</enum></record><record orange="282" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice3>3 choice</choice3><enum>horror</enum></record><record orange="283"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice4>4 choice</choice4><enum>history</enum></record><record orange="284" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice1>1 choice</choice1><enum>philosophy</enum></record><record orange="285"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice2>2 choice</choice2><enum>romance</enum></record><record orange="286" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice3>3 choice</choice3><enum>fiction</enum></record><record orange="287"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice4>4 choice</choice4><enum>horror</enum></record><record orange="288" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice1>1 choice</choice1><enum>history</enum></record><record orange="289"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice2>2 choice</choice2><enum>philosophy</enum></record><record orange="290" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice3>3 choice</choice3><enum>romance</enum></record><record orange="291"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice4>4 choice</choice4><enum>fiction</enum></record><record orange="292" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice1>1 choice</choice1><enum>horror</enum></record><record orange="293"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice2>2 choice</choice2><enum>history</enum></record><record orange="294" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice3>3 choice</choice3><enum>philosophy</enum></record><record orange="295"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice4>4 choice</choice4><enum>romance</enum></record><record orange="296" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice1>1 choice</choice1><enum>fiction</enum></record><record orange="297"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice2>2 choice</choice2><enum>horror</enum></record><record orange="298" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice3>3 choice</choice3><enum>history</enum></record><record orange="299"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice4>4 choice</choice4><enum>philosophy</enum></record><record orange="300" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice1>1 choice</choice1><enum>romance</enum></record><record orange="301"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice2>2 choice</choice2><enum>fiction</enum></record><record orange="302" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice3>3 choice</choice3><enum>horror</enum></record><record orange="303"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice4>4 choice</choice4><enum>history</enum></record><record orange="304" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice1>1 choice</choice1><enum>philosophy</enum></record><record orange="305"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice2>2 choice</choice2><enum>romance</enum></record><record orange="306" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice3>3 choice</choice3><enum>fiction</enum></record><record orange="307"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice4>4 choice</choice4><enum>horror</enum></record><record orange="308" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice1>1 choice</choice1><enum>history</enum></record><record orange="309"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice2>2 choice</choice2><enum>philosophy</enum></record><record orange="310" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice3>3 choice</choice3><enum>romance</enum></record><record orange="311"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice4>4 choice</choice4><enum>fiction</enum></record><record orange="312" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice1>1 choice</choice1><enum>horror</enum></record><record orange="313"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice2>2 choice</choice2><enum>history</enum></record><record orange="314" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice3>3 choice</choice3><enum>philosophy</enum></record><record orange="315"><int>42</int><double>42345.4232</double><name>name123_45</name><string>one two three</string><choice4>4 choice</choice4><enum>romance</enum></record><record orange="316" apple="true"><int>42</int><double>42345.4232</double><name>name123_45</name><choice1>1 choice</choice1><enum>fiction</enum></record></t:root>
\ No newline at end of file
diff --git a/examples/performance/test.xsd b/examples/performance/test.xsd
new file mode 100644
index 0000000..e85b2ac
--- /dev/null
+++ b/examples/performance/test.xsd
@@ -0,0 +1,49 @@
+<?xml version="1.0"?>
+
+<!--
+
+file      : examples//performance/test.xsd
+copyright : not copyrighted - public domain
+
+-->
+
+<schema targetNamespace="test" xmlns:t="test"
+        xmlns="http://www.w3.org/2001/XMLSchema">
+
+  <simpleType name="enum">
+    <restriction base="string">
+      <enumeration value="romance"/>
+      <enumeration value="fiction"/>
+      <enumeration value="horror"/>
+      <enumeration value="history"/>
+      <enumeration value="philosophy"/>
+    </restriction>
+  </simpleType>
+
+  <complexType name="record">
+    <sequence>
+      <element name="int" type="unsignedInt"/>
+      <element name="double" type="double"/>
+      <element name="name" type="NCName"/>
+      <element name="string" type="string" minOccurs="0" maxOccurs="1"/>
+      <choice>
+        <element name="choice1" type="string"/>
+        <element name="choice2" type="string"/>
+        <element name="choice3" type="string"/>
+        <element name="choice4" type="string"/>
+      </choice>
+      <element name="enum" type="t:enum"/>
+    </sequence>
+    <attribute name="apple" type="boolean"/>
+    <attribute name="orange" type="unsignedLong" use="required"/>
+  </complexType>
+
+  <complexType name="root">
+    <sequence>
+      <element name="record" type="t:record" maxOccurs="unbounded"/>
+    </sequence>
+  </complexType>
+
+  <element name="root" type="t:root"/>
+
+</schema>
diff --git a/examples/performance/time.cxx b/examples/performance/time.cxx
new file mode 100644
index 0000000..cfb6d09
--- /dev/null
+++ b/examples/performance/time.cxx
@@ -0,0 +1,46 @@
+// file      : examples/performance/time.cxx
+// copyright : not copyrighted - public domain
+
+#include "time.hxx"
+
+#if defined (WIN32) || defined (__WIN32__)
+#  define WIN32_LEAN_AND_MEAN
+#  include <windows.h>  // GetSystemTimeAsFileTime
+#else
+#  include <time.h>     // gettimeofday
+#  include <sys/time.h> // timeval
+#endif
+
+#include <ostream> // std::ostream
+#include <iomanip> // std::setfill, std::setw
+
+namespace os
+{
+  time::
+  time ()
+  {
+#if defined (WIN32) || defined (__WIN32__)
+    FILETIME ft;
+    GetSystemTimeAsFileTime (&ft);
+    unsigned long long v (
+      ((unsigned long long) (ft.dwHighDateTime) << 32) + ft.dwLowDateTime);
+
+    sec_  = static_cast<unsigned long> (v / 10000000ULL);
+    nsec_ = static_cast<unsigned long> ((v % 10000000ULL) * 100);
+#else
+    timeval tv;
+    if (gettimeofday(&tv, 0) != 0)
+      throw failed ();
+
+    sec_  = static_cast<unsigned long> (tv.tv_sec);
+    nsec_ = static_cast<unsigned long> (tv.tv_usec * 1000);
+#endif
+  }
+
+  std::ostream&
+  operator<< (std::ostream& o, time const& t)
+  {
+    return o << t.sec () << '.'
+             << std::setfill ('0') << std::setw (9) << t.nsec ();
+  }
+}
diff --git a/examples/performance/time.hxx b/examples/performance/time.hxx
new file mode 100644
index 0000000..e163617
--- /dev/null
+++ b/examples/performance/time.hxx
@@ -0,0 +1,110 @@
+// file      : examples//performance/time.hxx
+// copyright : not copyrighted - public domain
+
+#ifndef TIME_HXX
+#define TIME_HXX
+
+#include <iosfwd> // std::ostream&
+
+namespace os
+{
+  class time
+  {
+  public:
+    class failed {};
+
+    // Create a time object representing the current time.
+    //
+    time ();
+
+    time (unsigned long long nsec)
+    {
+      sec_  = static_cast<unsigned long> (nsec / 1000000000ULL);
+      nsec_ = static_cast<unsigned long> (nsec % 1000000000ULL);
+    }
+
+    time (unsigned long sec, unsigned long nsec)
+    {
+      sec_  = sec;
+      nsec_ = nsec;
+    }
+
+  public:
+    unsigned long
+    sec () const
+    {
+      return sec_;
+    }
+
+    unsigned long
+    nsec () const
+    {
+      return nsec_;
+    }
+
+  public:
+    class overflow {};
+    class underflow {};
+
+    time
+    operator+= (time const& b)
+    {
+      unsigned long long tmp = 0ULL + nsec_ + b.nsec_;
+
+      sec_ += static_cast<unsigned long> (b.sec_ + tmp / 1000000000ULL);
+      nsec_ = static_cast<unsigned long> (tmp % 1000000000ULL);
+
+      return *this;
+    }
+
+    time
+    operator-= (time const& b)
+    {
+      if (*this < b)
+        throw underflow ();
+
+      sec_ -= b.sec_;
+
+      if (nsec_ < b.nsec_)
+      {
+        --sec_;
+        nsec_ += 1000000000ULL - b.nsec_;
+      }
+      else
+        nsec_ -= b.nsec_;
+
+      return *this;
+    }
+
+    friend time
+    operator+ (time const& a, time const& b)
+    {
+      time r (a);
+      r += b;
+      return r;
+    }
+
+    friend time
+    operator- (time const& a, time const& b)
+    {
+      time r (a);
+      r -= b;
+      return r;
+    }
+
+    friend bool
+    operator < (time const& a, time const& b)
+    {
+      return (a.sec_ < b.sec_) || (a.sec_ == b.sec_ && a.nsec_ < b.nsec_);
+    }
+
+  private:
+    unsigned long sec_;
+    unsigned long nsec_;
+  };
+
+  std::ostream&
+  operator<< (std::ostream&, time const&);
+}
+
+#endif // TIME_HXX