Message 391156 - Python tracker

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In-reply-to
Author	rhettinger
Recipients	FFY00, jefferyto, rhettinger, vstinner, yan12125
Date	2021年04月15日.23:49:04
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1618530544.85.0.766328831906.issue37596@roundup.psfhosted.org>

Content
> Would it be reasonable to make it so that sets are > always created with the definition order? 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.

Content

> Would it be reasonable to make it so that sets are 
> always created with the definition order?
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.

History
Date	User	Action	Args
2021年04月15日 23:49:04	rhettinger	set	recipients: + rhettinger, vstinner, yan12125, FFY00, jefferyto
2021年04月15日 23:49:04	rhettinger	set	messageid: <1618530544.85.0.766328831906.issue37596@roundup.psfhosted.org>
2021年04月15日 23:49:04	rhettinger	link	issue37596 messages
2021年04月15日 23:49:04	rhettinger	create

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