Mercurial > hg
annotate hgweb.cgi @ 29787:80df04266a16
hgweb: profile HTTP requests
Currently, running `hg serve --profile` doesn't yield anything useful:
when the process is terminated the profiling output displays results
from the main thread, which typically spends most of its time in
select.select(). Furthermore, it has no meaningful results from
mercurial.* modules because the threads serving HTTP requests don't
actually get profiled.
This patch teaches the hgweb wsgi applications to profile individual
requests. If profiling is enabled, the profiler kicks in after
HTTP/WSGI environment processing but before Mercurial's main request
processing.
The profile results are printed to the configured profiling output.
If running `hg serve` from a shell, they will be printed to stderr,
just before the HTTP request line is logged. If profiling to a file,
we only write a single profile to the file because the file is not
opened in append mode. We could add support for appending to files
in a future patch if someone wants it.
Per request profiling doesn't work with the statprof profiler because
internally that profiler collects samples from the thread that
*initially* requested profiling be enabled. I have plans to address
this by vendoring Facebook's customized statprof and then improving
it.
author | Gregory Szorc <gregory.szorc@gmail.com> |
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date | Sun, 14 Aug 2016 18:37:24 -0700 |
parents | 4b0fc75f9403 |
children | 47ef023d0165 |
rev | line source |
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202 | 1 #!/usr/bin/env python |
159 | 2 # |
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3 # An example hgweb CGI script, edit as necessary |
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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
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7 config = "/path/to/repo/or/config" |
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cgi: sys.path.insert should be before importing mercurial
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8 |
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hgweb: add hint about finding library path with debuginstall
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9 # Uncomment and adjust if Mercurial is not installed system-wide |
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10 # (consult "installed modules" path from 'hg debuginstall'): |
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parents:
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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)
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12 |
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hgweb: disable cgitb by default
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13 # Uncomment to send python tracebacks to the browser if an error occurs: |
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14 #import cgitb; cgitb.enable() |
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mpm@selenic.com
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15 |
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hgweb: simplify hgweb.cgi, add help pointer
Matt Mackall <mpm@selenic.com>
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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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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) |