Mercurial > hg
view tests/test-backwards-remove.t @ 16414:e8d37b78acfb
parsers: use base-16 trie for faster node->rev mapping
This greatly speeds up node->rev lookups, with results that are
often user-perceptible: for instance, "hg --time log" of the node
associated with rev 1000 on a linux-2.6 repo improves from 0.3
seconds to 0.03. I have not found any instances of slowdowns.
The new perfnodelookup command in contrib/perf.py demonstrates the
speedup more dramatically, since it performs no I/O. For a single
lookup, the new code is about 40x faster.
These changes also prepare the ground for the possibility of further
improving the performance of prefix-based node lookups.
author | Bryan O'Sullivan <bryano@fb.com> |
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date | Thu, 12 Apr 2012 14:05:59 -0700 |
parents | 4c94b6d0fb1c |
children | 5c2a4f37eace |
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$ hg init $ echo This is file a1 > a $ hg add a $ hg commit -m "commit #0" $ ls a $ echo This is file b1 > b $ hg add b $ hg commit -m "commit #1" $ hg co 0 0 files updated, 0 files merged, 1 files removed, 0 files unresolved B should disappear $ ls a