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author	Dennis Sweeney <36520290+sweeneyde@users.noreply.github.com>
	Sat, 8 Jan 2022 03:47:58 +0000 (22:47 -0500)
committer	GitHub <noreply@github.com>
	Sat, 8 Jan 2022 03:47:58 +0000 (21:47 -0600)
commit	ad1d5908ada171eff768291371a80022bfad4f04
tree	040c1e3391995791c8114ea62c911756ad824c68	tree \| snapshot
parent	6fa8b2ceee38187b0ae96aee12fe4f0a5c8a2ce7	commit \| diff

bpo-46235: Do all ref-counting at once during list/tuple multiplication (GH-30346)

When multiplying lists and tuples by `n`, increment each element's refcount, by `n`, just once.

Saves `n-1` increments per element, and allows for a leaner & faster copying loop.

Code by sweeneyde (Dennis Sweeney).

Misc/NEWS.d/next/Core and Builtins/2022-01-02-23-55-13.bpo-46235.gUjp2v.rst	[new file with mode: 0644]	blob
Objects/listobject.c		diff \| blob \| blame \| history
Objects/tupleobject.c		diff \| blob \| blame \| history

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