util: add inspect suffix to BigInt64Array elements #21499
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not-an-aardvark
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This commit updates `util.inspect` to add an `n` suffix to BigInts that appear in BigInt64Arrays. BigInts are formatted with an `n` suffix in most cases, but this did not occur in BigInt64Arrays due to an apparent oversight where the implementation of `inspect` for typed arrays assumed that all typed array elements are numbers.
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targos
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devsnek
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lib/util.js
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| @@ -897,8 +901,12 @@ function formatTypedArray(ctx, value, recurseTimes, keys) { | |||
| const maxLength = Math.min(Math.max(0, ctx.maxArrayLength), value.length); | |||
| const remaining = value.length - maxLength; | |||
| const output = new Array(maxLength + (remaining > 0 ? 1 : 0)); | |||
| const elementFormatter = | |||
| types.isBigInt64Array(value) || types.isBigUint64Array(value) ? | |||
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typeof value[0] will be waaaaaay faster
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That would result in elementFormatter having the wrong value when the array is empty, although admittedly it wouldn't matter in that case because elementFormatter would never be called. I'll change it to use typeof.
devsnek
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BridgeAR
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Jun 24, 2018
lib/util.js
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| @@ -897,8 +901,11 @@ function formatTypedArray(ctx, value, recurseTimes, keys) { | |||
| const maxLength = Math.min(Math.max(0, ctx.maxArrayLength), value.length); | |||
| const remaining = value.length - maxLength; | |||
| const output = new Array(maxLength + (remaining > 0 ? 1 : 0)); | |||
| const elementFormatter = typeof value[0] === 'number' ? | |||
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Please change it to:
const formatter = len !== 0 && typeof value[0] === 'number' ?
formatNumber :
formatBigInt;Otherwise the OOB access for an empty TypedArray slows down all following calls.
TimothyGu
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Jun 24, 2018
cjihrig
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Jun 24, 2018
TimothyGu
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Jun 24, 2018
| @@ -897,8 +901,11 @@ function formatTypedArray(ctx, value, recurseTimes, keys) { | |||
| const maxLength = Math.min(Math.max(0, ctx.maxArrayLength), value.length); | |||
| const remaining = value.length - maxLength; | |||
| const output = new Array(maxLength + (remaining > 0 ? 1 : 0)); | |||
| const elementFormatter = value.length > 0 && typeof value[0] === 'number' ? | |||
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benjamingr
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jasnell
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hiroppy
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Jun 25, 2018
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Landed in 80496a5 |
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This commit updates `util.inspect` to add an `n` suffix to BigInts that appear in BigInt64Arrays. BigInts are formatted with an `n` suffix in most cases, but this did not occur in BigInt64Arrays due to an apparent oversight where the implementation of `inspect` for typed arrays assumed that all typed array elements are numbers. PR-URL: #21499 Reviewed-By: Michaël Zasso <targos@protonmail.com> Reviewed-By: Gus Caplan <me@gus.host> Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de> Reviewed-By: Tiancheng "Timothy" Gu <timothygu99@gmail.com> Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com> Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Yuta Hiroto <hello@hiroppy.me>
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Checklist
make -j4 test(UNIX), orvcbuild test(Windows) passesThis commit updates
util.inspectto add annsuffix to BigInts thatappear in BigInt64Arrays. BigInts are formatted with an
nsuffix inmost cases, but this did not occur in BigInt64Arrays due to an apparent
oversight where the implementation of
inspectfor typed arrays assumedthat all typed array elements are numbers.