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| author | Antoine Pitrou <pitrou@free.fr> | 2017-07-23 11:05:26 (GMT) |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2017-07-23 11:05:26 (GMT) |
| commit | 3051f0b78e53d1b771b49375dc139ca13f9fd76e (patch) | |
| tree | ec89d4a88f30a885d875f44948ccf41ed6c5ab1f /Misc/NEWS.d/next/Library | |
| parent | 2b1e6e9696cb433c0e0da11145157d54275d119f (diff) | |
| download | cpython-3051f0b78e53d1b771b49375dc139ca13f9fd76e.zip cpython-3051f0b78e53d1b771b49375dc139ca13f9fd76e.tar.gz cpython-3051f0b78e53d1b771b49375dc139ca13f9fd76e.tar.bz2 | |
bpo-30919: shared memory allocation performance regression in multiprocessing (#2708)
* Fix #30919: shared memory allocation performance regression in multiprocessing
* Change strategy for Arena directory choice
* Add blurb
Diffstat (limited to 'Misc/NEWS.d/next/Library')
| -rw-r--r-- | Misc/NEWS.d/next/Library/2017-07-23-11-33-10.bpo-30919.5dYRru.rst | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/Misc/NEWS.d/next/Library/2017-07-23-11-33-10.bpo-30919.5dYRru.rst b/Misc/NEWS.d/next/Library/2017-07-23-11-33-10.bpo-30919.5dYRru.rst new file mode 100644 index 0000000..44c3a22 --- /dev/null +++ b/Misc/NEWS.d/next/Library/2017-07-23-11-33-10.bpo-30919.5dYRru.rst @@ -0,0 +1,4 @@ +Fix shared memory performance regression in multiprocessing in 3.x. + +Shared memory used anonymous memory mappings in 2.x, while 3.x mmaps actual +files. Try to be careful to do as little disk I/O as possible. |