Add quality: move change callback out of image

1 files changed, 14 insertions, 0 deletions

diff --git a/quality/list b/quality/list
index 2ef008a..b7f0e0f 100644
--- a/quality/list
+++ b/quality/list
@@ -1 +1,15 @@
 - Inconsistent id() vs direct access use in generated code
+
+? Move change_callback out of image
+
+  We incur a bit of overhead in case of a batch (e.g., ~80KB for
+  a batch size of 5000 on 64-bit) since we don't use this callback
+  in all but the first element.
+
+  The idea is to move it to the object statements, however, there
+  are several places that need to access it that only got the image
+  (e.g., init(image)). Storing a pointer in the image doesn't make
+  sense since the struct itself is two pointers.
+
+  So it is not clear this is worth the effort. See also a separate
+  paper with some more thoughts on this.