base64-arraybuffer - npm Package Compare versions

Comparing version 0.1.4 to 0.1.5

lib/base64-arraybuffer.js

@@ -8,5 +8,13 @@ /*
  */
-(function(chars){
+(function(){
   "use strict";
 
+  var chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+
+  // Use a lookup table to find the index.
+  var lookup = new Uint8Array(256);
+  for (var i = 0; i < chars.length; i++) {
+    lookup[chars.charCodeAt(i)] = i;
+  }
+
   exports.encode = function(arraybuffer) {
@@ -48,6 +56,6 @@ var bytes = new Uint8Array(arraybuffer),
     for (i = 0; i < len; i+=4) {
-      encoded1 = chars.indexOf(base64[i]);
-      encoded2 = chars.indexOf(base64[i+1]);
-      encoded3 = chars.indexOf(base64[i+2]);
-      encoded4 = chars.indexOf(base64[i+3]);
+      encoded1 = lookup[base64.charCodeAt(i)];
+      encoded2 = lookup[base64.charCodeAt(i+1)];
+      encoded3 = lookup[base64.charCodeAt(i+2)];
+      encoded4 = lookup[base64.charCodeAt(i+3)];
 
@@ -61,2 +69,2 @@ bytes[p++] = (encoded1 << 2) | (encoded2 >> 4);
   };
-})("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/");
+})();

package.json

 {
   "name": "base64-arraybuffer",
   "description": "Encode/decode base64 data into ArrayBuffers",
-  "version": "0.1.4",
+  "version": "0.1.5",
   "homepage": "https://github.com/niklasvh/base64-arraybuffer",
@@ -6,0 +6,0 @@ "author": {

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Improved metrics

Total package byte prevSize

5228

increased by3.81%

Lines of code

55

increased by12.24%

No dependency changes