sparse-revlog: skip the span check in the sparse-revlog case
This significantly improves the performance on unbundling on smaller
repositories.
Mercurial: unbundling 1K revisions
no-sparse-revlog: 500 ms
sparse-revlog-before: 689 ms
sparse-revlog-after: 484 ms
Pypy: unbundling 1K revisions
no-sparse-revlog: 1.242 s
sparse-revlog-before: 1.135 s
sparse-revlog-after: 0.860 s
NetBeans: unbundling 1K revisions
no-sparse-revlog: 1.386 s
sparse-revlog-before: 2.368 s
sparse-revlog-after: 1.191 s
Mozilla: unbundling 1K revisions
no-sparse-revlog: 3.103 s
sparse-revlog-before: 3.367 s
sparse-revlog-after: 3.093 s
#require no-pure
A script to generate nasty diff worst-case scenarios:
$ cat > s.py <<EOF
> import random
> for x in range(100000):
> print
> if random.randint(0, 100) >= 50:
> x += 1
> print(hex(x))
> EOF
$ hg init a
$ cd a
Check in a big file:
$ "$PYTHON" ../s.py > a
$ hg ci -qAm0
Modify it:
$ "$PYTHON" ../s.py > a
Time a check-in, should never take more than 10 seconds user time:
$ hg ci --time -m1
time: real .* secs .user [0-9][.].* sys .* (re)