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buffer: default to UTF8 in byteLength()
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If an undefined encoding is passed to byteLength(),
assume that it is UTF8 immediately. This yields a
small speedup, as it prevents string operations on
the encoding argument.

PR-URL: #4010
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Trevor Norris <[email protected]>
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tomgco authored and rvagg committed Dec 5, 2015
1 parent ed255ab commit ab5b529
Showing 1 changed file with 1 addition and 0 deletions.
1 change: 1 addition & 0 deletions lib/buffer.js
Original file line number Diff line number Diff line change
Expand Up @@ -272,6 +272,7 @@ function byteLength(string, encoding) {

case 'utf8':
case 'utf-8':
case undefined:
return binding.byteLengthUtf8(string);

case 'ucs2':
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