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switch optimization

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notmasteryet 2011-08-14 16:34:19 -05:00
parent 180747dbdc
commit 03c5fa3d19
1 changed files with 3 additions and 11 deletions
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14
pdf.js
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@ -2081,17 +2081,9 @@ var LZWStream = (function() {
dictionaryLengths[nextCode] = dictionaryLengths[prevCode] + 1;
dictionaryValues[nextCode] = currentSequence[0];
nextCode++;
switch (nextCode + earlyChange) {
case 512:
codeLength = 10;
break;
case 1024:
codeLength = 11;
break;
case 2048:
codeLength = 12;
break;
}
codeLength = (nextCode + earlyChange) & (nextCode + earlyChange - 1) ?
codeLength : Math.min(Math.log(nextCode + earlyChange) /
0.6931471805599453 + 1, 12) | 0;
}
prevCode = code;