diff tests/test-fastannotate-corrupt.t @ 39210:1ddb296e0dee

fastannotate: initial import from Facebook's hg-experimental

I made as few changes as I could to get the tests to pass, but this
was a bit involved due to some churn in the blame code since someone
last gave fastannotate any TLC.

There's still follow-up work here to rip out support for old versions
of hg and to integrate the protocol with modern standards.

Some performance numbers (all on my 2016 MacBook Pro with a 2.6Ghz i7):

Mercurial mercurial/manifest.py
traditional blame
time: real 1.050 secs (user 0.990+0.000 sys 0.060+0.000)
build cache
time: real 5.900 secs (user 5.720+0.000 sys 0.110+0.000)
fastannotate
time: real 0.120 secs (user 0.100+0.000 sys 0.020+0.000)

Mercurial mercurial/localrepo.py
traditional blame
time: real 3.330 secs (user 3.220+0.000 sys 0.070+0.000)
build cache
time: real 30.610 secs (user 30.190+0.000 sys 0.230+0.000)
fastannotate
time: real 0.180 secs (user 0.160+0.000 sys 0.020+0.000)

mozilla-central dom/ipc/ContentParent.cpp
traditional blame
time: real 7.640 secs (user 7.210+0.000 sys 0.380+0.000)
build cache
time: real 98.650 secs (user 97.000+0.000 sys 0.950+0.000)
fastannotate
time: real 1.580 secs (user 1.340+0.000 sys 0.240+0.000)

mozilla-central dom/base/nsDocument.cpp
traditional blame
time: real 17.110 secs (user 16.490+0.000 sys 0.500+0.000)
build cache
time: real 399.750 secs (user 394.520+0.000 sys 2.610+0.000)
fastannotate
time: real 1.780 secs (user 1.530+0.000 sys 0.240+0.000)

So building the cache is expensive (but might be faster with xdiff
enabled), but the blame results are *way* faster.

Differential Revision: https://phab.mercurial-scm.org/D3994

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/test-fastannotate-corrupt.t	Mon Jul 30 22:50:00 2018 -0400
@@ -0,0 +1,83 @@
+  $ cat >> $HGRCPATH << EOF
+  > [extensions]
+  > fastannotate=
+  > EOF
+
+  $ hg init repo
+  $ cd repo
+  $ for i in 0 1 2 3 4; do
+  >   echo $i >> a
+  >   echo $i >> b
+  >   hg commit -A -m $i a b
+  > done
+
+use the "debugbuildannotatecache" command to build annotate cache at rev 0
+
+  $ hg debugbuildannotatecache --debug --config fastannotate.mainbranch=0
+  fastannotate: a: 1 new changesets in the main branch
+  fastannotate: b: 1 new changesets in the main branch
+
+"debugbuildannotatecache" should work with broken cache (and other files would
+be built without being affected). note: linelog being broken is only noticed
+when we try to append to it.
+
+  $ echo 'CORRUPT!' >> .hg/fastannotate/default/a.m
+  $ hg debugbuildannotatecache --debug --config fastannotate.mainbranch=1
+  fastannotate: a: rebuilding broken cache
+  fastannotate: a: 2 new changesets in the main branch
+  fastannotate: b: 1 new changesets in the main branch
+
+  $ echo 'CANNOT REUSE!' > .hg/fastannotate/default/a.l
+  $ hg debugbuildannotatecache --debug --config fastannotate.mainbranch=2
+  fastannotate: a: rebuilding broken cache
+  fastannotate: a: 3 new changesets in the main branch
+  fastannotate: b: 1 new changesets in the main branch
+
+  $ rm .hg/fastannotate/default/a.m
+  $ hg debugbuildannotatecache --debug --config fastannotate.mainbranch=3
+  fastannotate: a: rebuilding broken cache
+  fastannotate: a: 4 new changesets in the main branch
+  fastannotate: b: 1 new changesets in the main branch
+
+  $ rm .hg/fastannotate/default/a.l
+  $ hg debugbuildannotatecache --debug --config fastannotate.mainbranch=3
+  $ hg debugbuildannotatecache --debug --config fastannotate.mainbranch=4
+  fastannotate: a: rebuilding broken cache
+  fastannotate: a: 5 new changesets in the main branch
+  fastannotate: b: 1 new changesets in the main branch
+
+"fastannotate" should deal with file corruption as well
+
+  $ rm -rf .hg/fastannotate
+  $ hg fastannotate --debug -r 0 a
+  fastannotate: a: 1 new changesets in the main branch
+  0: 0
+
+  $ echo 'CORRUPT!' >> .hg/fastannotate/default/a.m
+  $ hg fastannotate --debug -r 0 a
+  fastannotate: a: cache broken and deleted
+  fastannotate: a: 1 new changesets in the main branch
+  0: 0
+
+  $ echo 'CORRUPT!' > .hg/fastannotate/default/a.l
+  $ hg fastannotate --debug -r 1 a
+  fastannotate: a: cache broken and deleted
+  fastannotate: a: 2 new changesets in the main branch
+  0: 0
+  1: 1
+
+  $ rm .hg/fastannotate/default/a.l
+  $ hg fastannotate --debug -r 1 a
+  fastannotate: a: using fast path (resolved fctx: True)
+  fastannotate: a: cache broken and deleted
+  fastannotate: a: 2 new changesets in the main branch
+  0: 0
+  1: 1
+
+  $ rm .hg/fastannotate/default/a.m
+  $ hg fastannotate --debug -r 2 a
+  fastannotate: a: cache broken and deleted
+  fastannotate: a: 3 new changesets in the main branch
+  0: 0
+  1: 1
+  2: 2