Use shifts for integer multiplications.

cynthia · paroga · commit 0838441fe7a8 · 2016-09-14T15:54:30.000+02:00
diff --git a/cbor.js b/cbor.js
@@ -37,14 +37,14 @@ function encode(value) {
     var newByteLength = data.byteLength;
     var requiredLength = offset + length;
     while (newByteLength < requiredLength)
-      newByteLength *= 2;
+      newByteLength <<= 1;
     if (newByteLength !== data.byteLength) {
       var oldDataView = dataView;
       data = new ArrayBuffer(newByteLength);
       dataView = new DataView(data);
       var uint32count = (offset + 3) >> 2;
       for (var i = 0; i < uint32count; ++i)
-        dataView.setUint32(i * 4, oldDataView.getUint32(i * 4));
+        dataView.setUint32(i << 2, oldDataView.getUint32(i << 2));
     }
 
     lastLength = length;
