From 03c5fa3d19bac01a16245ee727b07477b8cabb2f Mon Sep 17 00:00:00 2001
From: notmasteryet <async.processingjs@yahoo.com>
Date: Sun, 14 Aug 2011 16:34:19 -0500
Subject: [PATCH] switch optimization

---
 pdf.js | 14 +++-----------
 1 file changed, 3 insertions(+), 11 deletions(-)

diff --git a/pdf.js b/pdf.js
index 24d602a86..79ae776f6 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;