--- ray/doc/notes/ReleaseNotes	2022/02/04 20:11:49	1.401
+++ ray/doc/notes/ReleaseNotes	2022/03/07 17:55:09	1.403
@@ -2504,3 +2504,13 @@ sanity checks.
 
 Added -O option to pvalue and pextrem to report watts/sr/m^2 even if
 picture is XYZE.
+
+Made subtle changes to header i/o routines to preserve alignment in
+binary file formats to enable memory-mapping.  Implemented memory-mapped
+matrix loading in rmtxop for binary double files.
+
+Removed ambient value sorting, which was written when ambient caches
+could overwhelm available memory.  This is rarely the case these days,
+and the added code complexity and updating of cache values with LRU
+counts dirties pages that would otherwise remain clean, so it was
+often a loss even when VM was an issue.