Message 391157 - Python tracker

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In-reply-to
Author	FFY00
Recipients	FFY00, jefferyto, rhettinger, vstinner, yan12125
Date	2021年04月16日.00:10:53
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1618531853.83.0.873165915065.issue37596@roundup.psfhosted.org>

Content
> No, it would not. We would also have to maintain order across set operations such as intersection which which would become dramatically more expensive if they had to maintain order. For example intersecting a million element set with a ten element set always takes ten steps regardless of the order of arguments, but to maintain order of the left hand operand could take a hundred times more work. Can these operations happen during bytecode generation? I am fairly new to these internals so my understanding is not great. During bytecode generation is can code that performs such operations run?

Content

> No, it would not. We would also have to maintain order across set operations such as intersection which which would become dramatically more expensive if they had to maintain order. For example intersecting a million element set with a ten element set always takes ten steps regardless of the order of arguments, but to maintain order of the left hand operand could take a hundred times more work.
Can these operations happen during bytecode generation? I am fairly new to these internals so my understanding is not great. During bytecode generation is can code that performs such operations run?

History
Date	User	Action	Args
2021年04月16日 00:10:53	FFY00	set	recipients: + FFY00, rhettinger, vstinner, yan12125, jefferyto
2021年04月16日 00:10:53	FFY00	set	messageid: <1618531853.83.0.873165915065.issue37596@roundup.psfhosted.org>
2021年04月16日 00:10:53	FFY00	link	issue37596 messages
2021年04月16日 00:10:53	FFY00	create

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