Mercurial > hg
annotate hgweb.cgi @ 32151:4d504e541d3d
rebase: use matcher to optimize manifestmerge
The old merge code would call manifestmerge and calculate the complete diff
between the source to the destination. In many cases, like rebase, the vast
majority of differences between the source and destination are irrelevant
because they are differences between the destination and the common ancestor
only, and therefore don't affect the merge. Since most actions are 'keep', all
the effort to compute them is wasted.
Instead, let's compute the difference between the source and the common ancestor
and only perform the diff of those files against the merge destination. When
using treemanifest, this lets us avoid loading almost the entire tree when
rebasing from a very old ancestor. This speeds up rebase of an old stack of 27
commits by 20x.
In mozilla-central, without treemanifest, when rebasing a commit from
default~100000 to default, this speeds up the manifestmerge step from 2.6s to
1.2s. However, the additional diff adds an overhead to all manifestmerge calls,
especially for flat manifests. When rebasing a commit from default~1 to default
it appears to add 100ms in mozilla-central. While we could put this optimization
behind a flag, I think the fact that it makes merge O(number of changes being
applied) instead of O(number of changes between X and Y) justifies it.
author | Durham Goode <durham@fb.com> |
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date | Wed, 03 May 2017 10:43:59 -0700 |
parents | 4b0fc75f9403 |
children | 47ef023d0165 |
rev | line source |
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202 | 1 #!/usr/bin/env python |
159 | 2 # |
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hgweb: simplify hgweb.cgi, add help pointer
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3 # An example hgweb CGI script, edit as necessary |
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urls: bulk-change primary website URLs
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4 # See also https://mercurial-scm.org/wiki/PublishingRepositories |
159 | 5 |
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6 # Path to repo or hgweb config to serve (see 'hg help hgweb') |
338167735124
hgweb: simplify hgweb.cgi, add help pointer
Matt Mackall <mpm@selenic.com>
parents:
6142
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7 config = "/path/to/repo/or/config" |
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cgi: sys.path.insert should be before importing mercurial
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
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8 |
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hgweb: add hint about finding library path with debuginstall
Matt Mackall <mpm@selenic.com>
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9 # Uncomment and adjust if Mercurial is not installed system-wide |
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hgweb: add hint about finding library path with debuginstall
Matt Mackall <mpm@selenic.com>
parents:
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10 # (consult "installed modules" path from 'hg debuginstall'): |
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hgweb: simplify hgweb.cgi, add help pointer
Matt Mackall <mpm@selenic.com>
parents:
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diff
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11 #import sys; sys.path.insert(0, "/path/to/python/lib") |
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Enable demandimport only in scripts, not in importable modules (issue605)
Thomas Arendsen Hein <thomas@intevation.de>
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12 |
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hgweb: disable cgitb by default
Maxim Dounin <mdounin@mdounin.ru>
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13 # Uncomment to send python tracebacks to the browser if an error occurs: |
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hgweb: simplify hgweb.cgi, add help pointer
Matt Mackall <mpm@selenic.com>
parents:
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14 #import cgitb; cgitb.enable() |
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hgweb: pull cgitb into CGI script example, where it can easily be disabled
mpm@selenic.com
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15 |
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hgweb: simplify hgweb.cgi, add help pointer
Matt Mackall <mpm@selenic.com>
parents:
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16 from mercurial import demandimport; demandimport.enable() |
338167735124
hgweb: simplify hgweb.cgi, add help pointer
Matt Mackall <mpm@selenic.com>
parents:
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17 from mercurial.hgweb import hgweb, wsgicgi |
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hgweb: simplify hgweb.cgi, add help pointer
Matt Mackall <mpm@selenic.com>
parents:
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18 application = hgweb(config) |
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Backed out changeset b913d3aacddc (see issue971/msg5317)
Thomas Arendsen Hein <thomas@intevation.de>
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19 wsgicgi.launch(application) |