Message 371776 - Python tracker

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In-reply-to
Author	vstinner
Recipients	shihai1991, vstinner
Date	2020年06月17日.21:36:12
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1592429772.13.0.764265282987.issue41006@roundup.psfhosted.org>

Content
I close the issue. Making more imports lazy doesn't bring much benefit. -- With the 3 changes, runpy now imports 55 modules, instead of 70. The startup time is 1.3x faster, 18 ms instead of 24 ms: Mean +- std dev: [before] 23.7 ms +- 0.4 ms -> [after] 17.8 ms +- 0.6 ms: 1.33x faster (-25%) -- Avoiding itertools and types doesn't bring much benefit: Mean +- std dev: [after] 17.8 ms +- 0.6 ms -> [WIP] 17.2 ms +- 0.4 ms: 1.03x faster (-3%)

Content

I close the issue. Making more imports lazy doesn't bring much benefit.
--
With the 3 changes, runpy now imports 55 modules, instead of 70.
The startup time is 1.3x faster, 18 ms instead of 24 ms:
Mean +- std dev: [before] 23.7 ms +- 0.4 ms -> [after] 17.8 ms +- 0.6 ms: 1.33x faster (-25%)
--
Avoiding itertools and types doesn't bring much benefit:
Mean +- std dev: [after] 17.8 ms +- 0.6 ms -> [WIP] 17.2 ms +- 0.4 ms: 1.03x faster (-3%)

History
Date	User	Action	Args
2020年06月17日 21:36:12	vstinner	set	recipients: + vstinner, shihai1991
2020年06月17日 21:36:12	vstinner	set	messageid: <1592429772.13.0.764265282987.issue41006@roundup.psfhosted.org>
2020年06月17日 21:36:12	vstinner	link	issue41006 messages
2020年06月17日 21:36:12	vstinner	create

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