Introduce fast paths to speed up NULL color conversion somewhat, particularly when using 64-bit code; on the decompression side, the "slow path" also now use an approach similar to that of the compression side (with the component loop outside of the column loop rather than inside.) This is faster when using 32-bit code.
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/branches/1.4.x@1521 632fc199-4ca6-4c93-a231-07263d6284db
diff --git a/ChangeLog.txt b/ChangeLog.txt
index 885a326..5e05a38 100644
--- a/ChangeLog.txt
+++ b/ChangeLog.txt
@@ -22,6 +22,11 @@
and to specify an expected result for them based on the particulars of your
platform.
+[4] The NULL color conversion routines have been significantly optimized,
+which speeds up the compression of RGB and CMYK JPEGs by 5-20% when using
+64-bit code and 0-3% when using 32-bit code, and the decompression of those
+images by 10-30% when using 64-bit code and 3-12% when using 32-bit code.
+
1.4.0
=====