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sidedatacopies: only store an entry if it has values...
sidedatacopies: only store an entry if it has values This will make for a shorter storage and help use to write faster code in simple case. This change already provided a speed boost for copy tracing. For example here is combined time of running copies tracing on a 6989 pairs of revision on the pypy repos: before: 771s after: 631s - 18% This also has a very positive impact on changelog size. For example here are the number for the `00changelog.d` file of pypy. before: 30449712 Bytes after: 24973718 Bytes - 18% This give an overall quite acceptable overhead for storing copies into the changelog: filelog-only: 23370586 sidedata: 24973718 Bytes + 7% Differential Revision: https://phab.mercurial-scm.org/D7068
Jun Wu - - Load All Authors

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cHg
===
A fast client for Mercurial command server running on Unix.
Install:
$ make
$ make install
Usage:
$ chg help # show help of Mercurial
$ alias hg=chg # replace hg command
$ chg --kill-chg-daemon # terminate background server
Environment variables:
Although cHg tries to update environment variables, some of them cannot be
changed after spawning the server. The following variables are specially
handled:
* configuration files are reloaded automatically by default.
* CHGHG or HG specifies the path to the hg executable spawned as the
background command server.
The following variables are available for testing:
* CHGDEBUG enables debug messages.
* CHGSOCKNAME specifies the socket path of the background cmdserver.
* CHGTIMEOUT specifies how many seconds chg will wait before giving up
connecting to a cmdserver. If it is 0, chg will wait forever. Default: 60