From b9fe85be288e792da628ddb343acb259c47cc343 Mon Sep 17 00:00:00 2001
From: Jay Berkenbilt <ejb@ql.org>
Date: Sat, 20 Jul 2013 10:17:35 -0400
Subject: Note about extra hash_V5 calls

---
 TODO | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/TODO b/TODO
index 6df0fcf0..1e4e309b 100644
--- a/TODO
+++ b/TODO
@@ -64,6 +64,11 @@
 General
 =======
 
+ * When decrypting files with /R=6, hash_V5 is called more than once
+   with the same inputs.  Caching the results or refactoring to reduce
+   the number of identical calls could improve performance for
+   workloads that involve processing large numbers of small files.
+
  * Consider providing a Windows installer for qpdf using NSIS.
 
  * Consider adding a method to balance the pages tree.  It would call
-- 
cgit v1.2.3-54-g00ecf