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| author | Gregory P. Smith <greg@krypto.org> | 2013-12-08 18:56:07 (GMT) |
|---|---|---|
| committer | Gregory P. Smith <greg@krypto.org> | 2013-12-08 18:56:07 (GMT) |
| commit | 589ecda56eb23937ba871734598cda8f11395389 (patch) | |
| tree | eca06a8daf598b2ef14f7f8a8b4f1a100b1f213c /Misc | |
| parent | 6976104a36aa426bcf23b2e4b7e7a706f25beeeb (diff) | |
| download | cpython-589ecda56eb23937ba871734598cda8f11395389.zip cpython-589ecda56eb23937ba871734598cda8f11395389.tar.gz cpython-589ecda56eb23937ba871734598cda8f11395389.tar.bz2 | |
Fixes issue #19929: Call os.read with 32768 within subprocess.Popen
communicate rather than 4096 for efficiency. A microbenchmark shows
Linux and OS X both using ~50% less cpu time this way.
Diffstat (limited to 'Misc')
| -rw-r--r-- | Misc/NEWS | 4 |
1 files changed, 4 insertions, 0 deletions
@@ -18,6 +18,10 @@ Core and Builtins Library ------- +- Issue #19929: Call os.read with 32768 within subprocess.Popen.communicate + rather than 4096 for efficiency. A microbenchmark shows Linux and OS X + both using ~50% less cpu time this way. + - Issue #19506: Use a memoryview to avoid a data copy when piping data to stdin within subprocess.Popen.communicate. 5-10% less cpu usage. |