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Message 285057 - Python tracker

Message285057

Author vstinner
Recipients python-dev, serhiy.storchaka, vstinner, xiang.zhang
Date 2017-01-09.17:28:49
SpamBayes Score -1.0
Marked as misclassified Yes
Message-id <1483982929.57.0.104679788872.issue28870@psf.upfronthosting.co.za>
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Content 
Impact of the _PY_FASTCALL_SMALL_STACK constant:

* _PY_FASTCALL_SMALL_STACK=1: 528 bytes/call

test_python_call 7376
test_python_getitem 6544
test_python_iterator 5572
=> total: 19 492

* _PY_FASTCALL_SMALL_STACK=3: 528 bytes/call

test_python_call 7272
test_python_getitem 6464
test_python_iterator 5512
=> total: 19 248

* _PY_FASTCALL_SMALL_STACK=5 (current value): 560 bytes/call

test_python_call 7172
test_python_getitem 6232
test_python_iterator 5344
=> total: 19 636

* _PY_FASTCALL_SMALL_STACK=10: 592 bytes/call

test_python_call 6984
test_python_getitem 5952
test_python_iterator 5132
=> total: 18 068

Increasing _PY_FASTCALL_SMALL_STACK has a clear effect on the total. Total decreases when _PY_FASTCALL_SMALL_STACK increases.


---

no_small_stack.patch with _PY_FASTCALL_SMALL_STACK=3: 368 bytes/call

test_python_call 7272
test_python_getitem 6628
test_python_iterator 5632
=> total: 19 532
History
Date User Action Args
2017-01-09 17:28:49vstinnersetrecipients: + vstinner, python-dev, serhiy.storchaka, xiang.zhang
2017-01-09 17:28:49vstinnersetmessageid: <1483982929.57.0.104679788872.issue28870@psf.upfronthosting.co.za>
2017-01-09 17:28:49vstinnerlinkissue28870 messages
2017-01-09 17:28:49vstinnercreate