Mercurial > hg-stable
view tests/test-hgk.t @ 26402:05871262acd5
treemanifest: rework lazy-copying code (issue4840)
The old lazy-copy code formed a chain of copied manifests with each
copy. Under typical operation, the stack never got more than a couple
of manifests deep and was fine. Under conditions like hgsubversion or
convert, the stack could get hundreds of manifests deep, and
eventually overflow the recursion limit for Python. I was able to
consistently reproduce this by converting an hgsubversion clone of
svn's history to treemanifests.
This may result in fewer manifests staying in memory during operations
like convert when treemanifests are in use, and should make those
operations faster since there will be significantly fewer noop
function calls going on.
A previous attempt (never mailed) of mine to fix this problem tried to
simply have all treemanifests only have a loadfunc - that caused
somewhat weird problems because the gettext() callable passed into
read() wasn't idempotent, so the easy solution is to have a loadfunc
and a copyfunc.
author | Augie Fackler <augie@google.com> |
---|---|
date | Fri, 25 Sep 2015 22:54:46 -0400 |
parents | 5fb1fc2e1281 |
children |
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Minimal hgk check $ echo "[extensions]" >> $HGRCPATH $ echo "hgk=" >> $HGRCPATH $ hg init repo $ cd repo $ echo a > a $ hg ci -Am adda adding a $ hg debug-cat-file commit 0 tree a0c8bcbbb45c parent 000000000000 author test 0 0 revision 0 branch default phase draft adda $ echo b > b $ hg ci -Am addb adding b $ hg log -T '{node}\n' 102a90ea7b4a3361e4082ed620918c261189a36a 07f4944404050f47db2e5c5071e0e84e7a27bba9 $ hg debug-diff-tree 07f494440405 102a90ea7b4a :000000 100664 000000000000 1e88685f5dde N b b $ hg debug-diff-tree 07f494440405 102a90ea7b4a --patch diff --git a/b b/b new file mode 100644 --- /dev/null +++ b/b @@ -0,0 +1,1 @@ +b Ensure that diff-tree output isn't affected by diffopts $ hg --config diff.noprefix=True debug-diff-tree 07f494440405 102a90ea7b4a :000000 100664 000000000000 1e88685f5dde N b b $ hg --config diff.noprefix=True debug-diff-tree --patch 07f494440405 102a90ea7b4a diff --git a/b b/b new file mode 100644 --- /dev/null +++ b/b @@ -0,0 +1,1 @@ +b $ cd ..