From: W. Felix Handte <w@felixhandte.com>
Date: Thu, 20 Aug 2020 21:17:10 +0000 (-0400)
Subject: Remove Chain Limit on Hash Cache Entries; Slightly Improve Compression
X-Git-Tag: v1.4.7~81^2~10
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7b9a755ac9a10d211c306f4ee26d7da1a9a07c96;p=thirdparty%2Fzstd.git

Remove Chain Limit on Hash Cache Entries; Slightly Improve Compression

Entries in the hashTable chain cache aren't subject to the same aliasing that
the circular chain table is subject to. As such, we don't need to stop when we
cross the chain limit. We can delve deeper. :)
---

diff --git a/lib/compress/zstd_lazy.c b/lib/compress/zstd_lazy.c
index d39398401..684e7e56e 100644
--- a/lib/compress/zstd_lazy.c
+++ b/lib/compress/zstd_lazy.c
@@ -611,10 +611,6 @@ size_t ZSTD_HcFindBestMatch_generic (
                     return ml;
                 }
             }
-
-            if (matchIndex <= ddsMinChain) {
-                return ml;
-            }
         }
 
         for ( ; (ddsAttempt < nbAttempts) & (matchIndex >= ddsMinChain); ddsAttempt++) {