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GeezerVison is showing github.com — buffer: optimize byteLength for common encodings · nodejs/node@d04246a

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`‎lib/buffer.js‎`

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+15-6Lines changed: 15 additions & 6 deletions

Original file line number	Diff line number	Diff line change
`@@ -780,13 +780,22 @@ function byteLength(string, encoding) {`
`780`	`780`	`if (len === 0)`
`781`	`781`	`return 0;`
`782`	`782`
`783`		`- if (encoding) {`
`784`		`- const ops = getEncodingOps(encoding);`
`785`		`- if (ops) {`
`786`		`- return ops.byteLength(string);`
`787`		`- }`
	`783`	`+ if (!encoding \|\| encoding === 'utf8') {`
	`784`	`+ return byteLengthUtf8(string);`
	`785`	`+ }`
	`786`	`+`
	`787`	`+ if (encoding === 'ascii') {`
	`788`	`+ return len;`
`788`	`789`	`}`
`789`		`- return byteLengthUtf8(string);`
	`790`	`+`
	`791`	`+ const ops = getEncodingOps(encoding);`
	`792`	`+ if (ops === undefined) {`
	`793`	`+ // TODO (ronag): Makes more sense to throw here.`
	`794`	`+ // throw new ERR_UNKNOWN_ENCODING(encoding);`
	`795`	`+ return byteLengthUtf8(string);`
	`796`	`+ }`
	`797`	`+`
	`798`	`+ return ops.byteLength(string);`
`790`	`799`	`}`
`791`	`800`
`792`	`801`	`Buffer.byteLength = byteLength;`

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