Mercurial > hg
annotate contrib/memory.py @ 29783:5d44197c208b
profiling: make profiling functions context managers (API)
This makes profiling more flexible since we can now call multiple
functions when a profiler is active. But the real reason for this
is to enable a future consumer to profile a function that returns
a generator. We can't do this from the profiling function itself
because functions can either be generators or have return values:
they can't be both. So therefore it isn't possible to have a generic
profiling function that can both consume and re-emit a generator
and return a value.
author | Gregory Szorc <gregory.szorc@gmail.com> |
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date | Sun, 14 Aug 2016 18:25:22 -0700 |
parents | ade330deb39a |
children | ff896733c66a |
rev | line source |
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contrib: helper extension to track memory usage
Martin Geisler <mg@lazybytes.net>
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1 # memory.py - track memory usage |
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2 # |
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3 # Copyright 2009 Matt Mackall <mpm@selenic.com> and others |
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4 # |
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5 # This software may be used and distributed according to the terms of the |
10264 | 6 # GNU General Public License version 2 or any later version. |
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7 |
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8 '''helper extension to measure memory usage |
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9 |
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10 Reads current and peak memory usage from ``/proc/self/status`` and |
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11 prints it to ``stderr`` on exit. |
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12 ''' |
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13 |
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contrib: make memory.py use absolute_import
Pulkit Goyal <7895pulkit@gmail.com>
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14 from __future__ import absolute_import |
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15 import atexit |
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16 |
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17 def memusage(ui): |
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18 """Report memory usage of the current process.""" |
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19 result = {'peak': 0, 'rss': 0} |
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with: use context manager for file I/O in memusage
Bryan O'Sullivan <bryano@fb.com>
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20 with open('/proc/self/status', 'r') as status: |
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21 # This will only work on systems with a /proc file system |
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22 # (like Linux). |
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23 for line in status: |
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24 parts = line.split() |
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25 key = parts[0][2:-1].lower() |
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26 if key in result: |
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27 result[key] = int(parts[1]) |
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many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
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28 ui.write_err(", ".join(["%s: %.1f MiB" % (key, value / 1024.0) |
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29 for key, value in result.iteritems()]) + "\n") |
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30 |
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31 def extsetup(ui): |
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32 atexit.register(memusage, ui) |