From patchwork Thu Feb  9 01:41:01 2017
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Subject: [1,of,4,RFC] chgcache: new experimental extension
From: Jun Wu <quark@fb.com>
X-Patchwork-Id: 18360
Message-Id: <138f7ba58a70de961071.1486604461@x1c>
To: <mercurial-devel@mercurial-scm.org>
Date: Wed, 8 Feb 2017 17:41:01 -0800

# HG changeset patch
# User Jun Wu <quark@fb.com>
# Date 1486601732 28800
#      Wed Feb 08 16:55:32 2017 -0800
# Node ID 138f7ba58a70de9610713b8bd55d1ba0ac468fa6
# Parent  a68510b69f413545722c086eaeb840dd5e8305b4
# Available At https://bitbucket.org/quark-zju/hg-draft
#              hg pull https://bitbucket.org/quark-zju/hg-draft -r 138f7ba58a70
chgcache: new experimental extension

This patch starts a new experimental extension - chgcache, which aims to
make chg stateful and be able to preload repo objects like the changelog,
the dirstate, the obsstore etc.

The feature is being developed as a new extension, instead of directly at
core chg, because its APIs and implementation details are still subject to
change.

diff --git a/hgext/chgcache.py b/hgext/chgcache.py
new file mode 100644
--- /dev/null
+++ b/hgext/chgcache.py
@@ -0,0 +1,11 @@
+# chgcache.py - add repo-level preloading functionality to chg
+#
+# Copyright 2017 Facebook, Inc.
+#
+# This software may be used and distributed according to the terms of the
+# GNU General Public License version 2 or any later version.
+"""repo-level caching for chg (EXPERIMENTAL)
+
+With this extension installed, Mercurial running with chg will be able to cache
+repo objects to further reduce start-up time.
+"""