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Title: Fastpath for encoding unsorted dict to JSON · Issue #95385 · python/cpython · GitHub

Open Graph Title: Fastpath for encoding unsorted dict to JSON · Issue #95385 · python/cpython

X Title: Fastpath for encoding unsorted dict to JSON · Issue #95385 · python/cpython

Description: JSON encoder can produce output sorted by key (json.dumps(sort_keys=True)) The default value for sort_keys is False. The code always creates a list of dictionary items, sorts them if needed, and then iterates through them. However, if so...

Open Graph Description: JSON encoder can produce output sorted by key (json.dumps(sort_keys=True)) The default value for sort_keys is False. The code always creates a list of dictionary items, sorts them if needed, and th...

X Description: JSON encoder can produce output sorted by key (json.dumps(sort_keys=True)) The default value for sort_keys is False. The code always creates a list of dictionary items, sorts them if needed, and th...

Opengraph URL: https://github.com/python/cpython/issues/95385

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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Fastpath for encoding unsorted dict to JSON","articleBody":"JSON encoder can produce output sorted by key (`json.dumps(sort_keys=True)`) The default value for `sort_keys` is `False`. The code always creates a list of dictionary items, sorts them if needed, and then iterates through them.\r\nHowever, if sorting is not requested we can use `PyDict_Next` to avoid allocating a list of tuples.\r\n\r\npyperformance on my machine before changes:\r\n\r\n```\r\n### json_dumps ###\r\nMean +- std dev: 10.6 ms +- 0.1 ms\r\n```\r\n\r\npyperformance after changes:\r\n\r\n```\r\n### json_dumps ###\r\nMean +- std dev: 9.00 ms +- 0.08 ms\r\n```","author":{"url":"https://github.com/aivarsk","@type":"Person","name":"aivarsk"},"datePublished":"2022-07-28T14:09:17.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":2},"url":"https://github.com/95385/cpython/issues/95385"}

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