[issue38219] Optimize dict.__init__ and dict.update for dict argument

Change by Serhiy Storchaka : -- resolution: -> fixed stage: patch review -> resolved status: open -> closed ___ Python tracker ___

[issue38219] Optimize dict.__init__ and dict.update for dict argument

Serhiy Storchaka added the comment: New changeset f163aeaa8c15b806b622c9cb10bc1d2a6e034e24 by Serhiy Storchaka in branch 'master': bpo-38219: Optimize dict creating and updating by a dict. (GH-16268) https://github.com/python/cpython/commit/f163aeaa8c15b806b622c9cb10bc1d2a6e034e24

[issue38219] Optimize dict.__init__ and dict.update for dict argument

Change by Karthikeyan Singaravelan : -- nosy: +inada.naoki ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe:

[issue38219] Optimize dict.__init__ and dict.update for dict argument

Change by Serhiy Storchaka : -- keywords: +patch pull_requests: +15859 stage: -> patch review pull_request: https://github.com/python/cpython/pull/16268 ___ Python tracker

[issue38219] Optimize dict.__init__ and dict.update for dict argument

New submission from Serhiy Storchaka : dict.__init__() and dict.update() with a positional argument look up the "keys" attribute of the argument to distinguish a mapping from a sequence of item-value pairs. It has a non-trivial cost. Merging dicts is optimized for exact dicts in