From patchwork Thu Jun 13 13:23:04 2019
Content-Type: text/plain; charset="utf-8"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
Subject: [09, of,
 10] deltas: skip if projected compressed size is bigger than previous
 snapshot
From: Pierre-Yves David <pierre-yves.david@ens-lyon.org>
X-Patchwork-Id: 40477
Message-Id: <2cf494071b512e698775.1560432184@nodosa.octopoid.net>
To: mercurial-devel@mercurial-scm.org
Date: Thu, 13 Jun 2019 14:23:04 +0100


diff --git a/mercurial/revlogutils/deltas.py b/mercurial/revlogutils/deltas.py
--- a/mercurial/revlogutils/deltas.py
+++ b/mercurial/revlogutils/deltas.py
@@ -966,6 +966,8 @@ class deltacomputer(object):
             snapshotlimit = revinfo.textlen >> snapshotdepth
             if snapshotlimit < lowestrealisticdeltalen:
                 return None
+            if revlog.length(base) < lowestrealisticdeltalen:
+                return None
         header, data = revlog.compress(delta)
         deltalen = len(header) + len(data)
         offset = revlog.end(len(revlog) - 1)