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perf: add perfrevlogrevision...
perf: add perfrevlogrevision As part of investigating performance improvements to revlog reading, I needed a mechanism to measure every part of revlog reading so I knew where time was spent and how effective optimizations were. This patch implements a perf command for benchmarking the various stages of reading a single revlog revision. When executed against a manifest revision at the end of a 30,000+ long delta chain in mozilla-central, the command demonstrates that ~80% of time is spent in zlib decompression.
Gregory Szorc -
r27470:d394a1a3 default
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Mercurial
=========

Mercurial is a fast, easy to use, distributed revision control tool
for software developers.

Basic install:

$ make # see install targets
$ make install # do a system-wide install
$ hg debuginstall # sanity-check setup
$ hg # see help

Running without installing:

$ make local # build for inplace usage
$ ./hg --version # should show the latest version

See https://mercurial-scm.org/ for detailed installation
instructions, platform-specific notes, and Mercurial user information.