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Merge pull request #4382 from nnethercote/off-by-one

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Avoid extra allocations in ensureBuffer() caused by an off-by-one error.
This commit is contained in:
Yury Delendik 2014-03-04 22:27:33 -06:00
commit f46942758f
1 changed files with 9 additions and 3 deletions
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12
src/core/stream.js
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@ -108,9 +108,15 @@ var DecodeStream = (function DecodeStreamClosure() {
DecodeStream.prototype = { DecodeStream.prototype = {
ensureBuffer: function DecodeStream_ensureBuffer(requested) { ensureBuffer: function DecodeStream_ensureBuffer(requested) {
var buffer = this.buffer; var buffer = this.buffer;
var current = buffer ? buffer.byteLength : 0; var current;
if (requested < current) if (buffer) {
return buffer; current = buffer.byteLength;
if (requested <= current) {
return buffer;
}
} else {
current = 0;
}
var size = 512; var size = 512;
while (size < requested) while (size < requested)
size <<= 1; size <<= 1;