stream: improve read() performance more #28989
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mscdex
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ronag
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Aug 6, 2019
| if (nb === buf.length) | ||
| ret.set(buf, ret.length - n); | ||
| else | ||
| ret.set(new Uint8Array(buf.buffer, buf.byteOffset, nb), ret.length - n); |
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yes, just confused as two how it can be faster. Some V8 thingy?
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yes. v8 can optimize the stuff it provides, but our buffer copy is basically a black box to it, since its written in c++. we could probably optimize our copy impl to use typedarray's set if there are no source offsets passed.
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wouldn't it better to apply this there then?
targos
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Aug 6, 2019
addaleax
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Aug 6, 2019
trivikr
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Aug 6, 2019
jasnell
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Aug 7, 2019
lpinca
approved these changes
Aug 7, 2019
|
Doesn't #29066 supersede this PR? |
|
@ronag Not really, |
PR-URL: nodejs#28989 Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: Luigi Pinca <luigipinca@gmail.com> Reviewed-By: Michaël Zasso <targos@protonmail.com> Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
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PR-URL: #28989 Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: Luigi Pinca <luigipinca@gmail.com> Reviewed-By: Michaël Zasso <targos@protonmail.com> Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
This was referenced Aug 20, 2019
lpinca
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make -j4 test(UNIX), orvcbuild test(Windows) passes