Message 308291 - Python tracker

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Author	serhiy.storchaka
Recipients	gvanrossum, levkivskyi, serhiy.storchaka, xgdomingo
Date	2017-12-14.12:22:24
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<[email protected]>
In-reply-to

Content
This adds an overhead to every indexing. $ ./python -m perf timeit --compare-to=./python0 -s 'a = [1]' --duplicate=10000 'a[0]' python0: ..................... 15.3 ns +- 0.5 ns python: ..................... 16.1 ns +- 0.3 ns Mean +- std dev: [python0] 15.3 ns +- 0.5 ns -> [python] 16.1 ns +- 0.3 ns: 1.05x slower (+5%) $ ./python -m perf timeit --compare-to=./python0 -s 'd = {1: 2}' --duplicate=10000 'd[1]' python0: ..................... 17.6 ns +- 0.6 ns python: ..................... 18.4 ns +- 0.5 ns Mean +- std dev: [python0] 17.6 ns +- 0.6 ns -> [python] 18.4 ns +- 0.5 ns: 1.05x slower (+5%)

This adds an overhead to every indexing.

$ ./python -m perf timeit --compare-to=./python0 -s 'a = [1]' --duplicate=10000 'a[0]'
python0: ..................... 15.3 ns +- 0.5 ns
python: ..................... 16.1 ns +- 0.3 ns

Mean +- std dev: [python0] 15.3 ns +- 0.5 ns -> [python] 16.1 ns +- 0.3 ns: 1.05x slower (+5%)

$ ./python -m perf timeit --compare-to=./python0 -s 'd = {1: 2}' --duplicate=10000 'd[1]'
python0: ..................... 17.6 ns +- 0.6 ns
python: ..................... 18.4 ns +- 0.5 ns

Mean +- std dev: [python0] 17.6 ns +- 0.6 ns -> [python] 18.4 ns +- 0.5 ns: 1.05x slower (+5%)

History
Date	User	Action	Args
2017-12-14 12:22:25	serhiy.storchaka	set	recipients: + serhiy.storchaka, gvanrossum, levkivskyi, xgdomingo
2017-12-14 12:22:24	serhiy.storchaka	set	messageid: <[email protected]>
2017-12-14 12:22:24	serhiy.storchaka	link	issue32226 messages
2017-12-14 12:22:24	serhiy.storchaka	create