rust-performance: introduce FastHashMap type alias for HashMap
Rust's default hashing is slow, because it is meant for preventing collision
attacks.
For all of the current Rust code, we don't care about those attacks, because
if an person with bad intentions has write access to your repo, you have other
issues.
I've chosen to use the TwoXHash crate because it was made by a reputable member
of the Rust community and has very good benchmarks.
For now it does not seem to improve performance by much for the current code,
but it's something else to not worry about when benchmarking code: in a
previous experiment with copytracing in Rust, it accounted for more than 10%
of the time of the entire script.
Differential Revision: https://phab.mercurial-scm.org/D7116
#testcases abortcommand abortflag
#if abortflag
$ cat >> $HGRCPATH <<EOF
> [alias]
> abort = histedit --abort
> EOF
#endif
$ . "$TESTDIR/histedit-helpers.sh"
Enable extension used by this test
$ cat >>$HGRCPATH <<EOF
> [extensions]
> histedit=
> EOF
=================================
Test backup-bundle config option|
=================================
Repo setup:
$ hg init foo
$ cd foo
$ echo first>file
$ hg ci -qAm one
$ echo second>>file
$ hg ci -m two
$ echo third>>file
$ hg ci -m three
$ echo forth>>file
$ hg ci -m four
$ hg log -G --style compact
@ 3[tip] 7d5187087c79 1970-01-01 00:00 +0000 test
| four
|
o 2 80d23dfa866d 1970-01-01 00:00 +0000 test
| three
|
o 1 6153eb23e623 1970-01-01 00:00 +0000 test
| two
|
o 0 36b4bdd91f5b 1970-01-01 00:00 +0000 test
one
Test when `backup-bundle` config option is enabled:
$ hg histedit -r '36b4bdd91f5b' --commands - << EOF
> pick 36b4bdd91f5b 0 one
> pick 6153eb23e623 1 two
> roll 80d23dfa866d 2 three
> edit 7d5187087c79 3 four
> EOF
merging file
Editing (7d5187087c79), you may commit or record as needed now.
(hg histedit --continue to resume)
[1]
$ hg abort
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
saved backup bundle to $TESTTMP/foo/.hg/strip-backup/1d8f701c7b35-cf7be322-backup.hg
saved backup bundle to $TESTTMP/foo/.hg/strip-backup/5c0056670bce-b54b65d0-backup.hg
Test when `backup-bundle` config option is not enabled
Enable config option:
$ cat >>$HGRCPATH <<EOF
> [rewrite]
> backup-bundle = False
> EOF
$ hg histedit -r '36b4bdd91f5b' --commands - << EOF
> pick 36b4bdd91f5b 0 one
> pick 6153eb23e623 1 two
> roll 80d23dfa866d 2 three
> edit 7d5187087c79 3 four
> EOF
merging file
Editing (7d5187087c79), you may commit or record as needed now.
(hg histedit --continue to resume)
[1]
$ hg abort
1 files updated, 0 files merged, 0 files removed, 0 files unresolved