Mercurial > public > mercurial-scm > hg-stable

diff mercurial/utils/compression.py @ 46122:84130fd74a22

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revlog: support none compression revlog files had uncompressed revlog entries support since forever, but it wasn't selectable or exposed explicitly. It is occassionally useful for performance testing as it avoids the latency of zlib or zstd. It also has the nice side effect of providing a non-default compression engine out-of-the-box. Differential Revision: https://phab.mercurial-scm.org/D9572
author Joerg Sonnenberger <joerg@bec.de>
date Sun, 13 Dec 2020 00:19:03 +0100
parents 89a2afe31e82
children 471cd86c8eb4
line wrap: on
line diff
--- a/mercurial/utils/compression.py	Thu Nov 12 10:41:03 2020 -0800
+++ b/mercurial/utils/compression.py	Sun Dec 13 00:19:03 2020 +0100
@@ -617,8 +617,10 @@
     def wireprotosupport(self):
         return compewireprotosupport(b'none', 0, 10)
 
-    # We don't implement revlogheader because it is handled specially
-    # in the revlog class.
+    # revlog special cases the uncompressed case, but implementing
+    # revlogheader allows forcing uncompressed storage.
+    def revlogheader(self):
+        return b'\0'
 
     def compressstream(self, it, opts=None):
         return it