Mercurial > hg
view mercurial/cffi/bdiffbuild.py @ 35305:483b5dd0f1aa
push: restrict common discovery to the pushed set
This changeset make use of the ability of the set discovery to only search
common changeset for a subset of the repository. Restricting that search to the
pushed set avoid potential waste of time finding out the status of many
unrelated related revision.
Repository with many heads were especially badly affected by this. Here is an
example of findcommonhead discovery for pushing 11 outgoing changeset on a
repository with tens of thousand of unrelated heads. (discovery run over a ssh
link to localhost).
Before:
queries: 92
time: 44.1996s
After:
queries: 3
time: 0.6938s
A x63 speedup even with a network link without latency.
author | Boris Feld <boris.feld@octobus.net> |
---|---|
date | Wed, 06 Dec 2017 23:33:01 +0100 |
parents | 2dcb3d52ef41 |
children | 0585337ea787 |
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from __future__ import absolute_import import cffi import os ffi = cffi.FFI() ffi.set_source("mercurial.cffi._bdiff", open(os.path.join(os.path.join(os.path.dirname(__file__), '..'), 'bdiff.c')).read(), include_dirs=['mercurial']) ffi.cdef(""" struct bdiff_line { int hash, n, e; ssize_t len; const char *l; }; struct bdiff_hunk; struct bdiff_hunk { int a1, a2, b1, b2; struct bdiff_hunk *next; }; int bdiff_splitlines(const char *a, ssize_t len, struct bdiff_line **lr); int bdiff_diff(struct bdiff_line *a, int an, struct bdiff_line *b, int bn, struct bdiff_hunk *base); void bdiff_freehunks(struct bdiff_hunk *l); void free(void*); """) if __name__ == '__main__': ffi.compile()