README.rst
author Pulkit Goyal <pulkit@yandex-team.ru>
Thu, 22 Nov 2018 15:14:24 +0300
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store: don't read the whole fncache in memory In large repositories with lot of files, the fncache grows more than 100 MB and reading that whole thing into memory slows things down. Let's not read the whole thing into memory. This patch changes fncache loading code to read 1 MB at once. Loading 1 MB at once saves ~1 sec on perffncacheload for our internal repository. I tried various values such as 0.5 MB, 5 MB, 10 MB but best results were produced using 1 MB as the chunksize. On a narrow clone with fncache around 40 MB, this patch saves ~0.04 seconds on average on perffncacheload. To test the code, I have coded an extension in test-fncache.t which set chunksize to 1 byte, and the test passes with that. Differential Revision: https://phab.mercurial-scm.org/D5296
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Mercurial
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=========
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Mercurial is a fast, easy to use, distributed revision control tool
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for software developers.
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Basic install::
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 $ make            # see install targets
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 $ make install    # do a system-wide install
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 $ hg debuginstall # sanity-check setup
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 $ hg              # see help
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Running without installing::
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 $ make local      # build for inplace usage
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 $ ./hg --version  # should show the latest version
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See https://mercurial-scm.org/ for detailed installation
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instructions, platform-specific notes, and Mercurial user information.