From: notmasteryet <async.processingjs@yahoo.com>
Date: Sun, 14 Aug 2011 21:34:19 +0000 (-0500)
Subject: switch optimization
X-Git-Url: https://git.parisson.com/?a=commitdiff_plain;h=03c5fa3d19bac01a16245ee727b07477b8cabb2f;p=pdf.js.git

switch optimization
---

diff --git a/pdf.js b/pdf.js
index 24d602a..79ae776 100644
--- a/pdf.js
+++ b/pdf.js
@@ -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;