7488 – Short array optimization for std.bitmanip.BitArray

Issue 7488 - Short array optimization for std.bitmanip.BitArray

Summary: Short array optimization for std.bitmanip.BitArray

Status:	NEW

Alias:	None

Product:	D
Classification:	Unclassified
Component:	phobos (show other issues)
Version:	D2
Hardware:	All All

Importance:	P4 enhancement
Assignee:	No Owner

URL:
Keywords:	bootcamp

Depends on:
Blocks:

Reported:	2012-02-12 11:59 UTC by bearophile_hugs
Modified:	2024-12-01 16:14 UTC (History)
CC List:	2 users (show)

See Also:	http://d.puremagic.com/issues/show_bug.cgi?id=7487

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Description bearophile_hugs 2012-02-12 11:59:28 UTC

An optimization for std.bitmanip.BitArray: when BitArray.length <= (size_t.sizeof * 8), then BitArray.ptr stores the bit themselves (so ptr is in a union with a size_t).

If the array of bits is short, this saves a GC allocation, increasing performance and reducing the amount of memory used and garbage produced.

Comment 1 SomeDude 2012-04-19 08:54:38 UTC

See related 7487 and 7490

Comment 2 dlangBugzillaToGithub 2024-12-01 16:14:53 UTC

THIS ISSUE HAS BEEN MOVED TO GITHUB

https://github.com/dlang/phobos/issues/9588

DO NOT COMMENT HERE ANYMORE, NOBODY WILL SEE IT, THIS ISSUE HAS BEEN MOVED TO GITHUB