Mercurial > public > mercurial-scm > hg-stable

diff mercurial/wireproto.py @ 17557:6d97dd630d79

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wireproto: bypass filechunkiter for small files when streaming Merely creating and using a generator has a measurable impact, particularly since the common case for stream_out is generators that yield just once. Avoiding generators improves stream_out performance by about 7%.
author Bryan O'Sullivan <bryano@fb.com>
date Fri, 14 Sep 2012 12:05:37 -0700
parents 39c6e349dfff
children 380a89413403
line wrap: on
line diff
--- a/mercurial/wireproto.py	Fri Sep 14 12:05:12 2012 -0700
+++ b/mercurial/wireproto.py	Fri Sep 14 12:05:37 2012 -0700
@@ -555,8 +555,11 @@
                 repo.ui.debug('sending %s (%d bytes)\n' % (name, size))
                 # partially encode name over the wire for backwards compat
                 yield '%s\0%d\n' % (store.encodedir(name), size)
-                for chunk in util.filechunkiter(sopener(name), limit=size):
-                    yield chunk
+                if size <= 65536:
+                    yield sopener(name).read(size)
+                else:
+                    for chunk in util.filechunkiter(sopener(name), limit=size):
+                        yield chunk
         finally:
             sopener.mustaudit = oldaudit