Mercurial > hg
view tests/test-debugindexdot.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 | be74ba87acaf |
children | f2719b387380 |
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Just exercize debugindexdot Create a short file history including a merge. $ hg init t $ cd t $ echo a > a $ hg ci -qAm t1 -d '0 0' $ echo a >> a $ hg ci -m t2 -d '1 0' $ hg up -qC 0 $ echo b >> a $ hg ci -m t3 -d '2 0' created new head $ HGMERGE=true hg merge -q $ hg ci -m merge -d '3 0' $ hg debugindexdot .hg/store/data/a.i digraph G { -1 -> 0 0 -> 1 0 -> 2 2 -> 3 1 -> 3 }