reduce lookup size, b64 chars are between 43 & 122

archmoj · archmoj · commit 7f7f3fa0cfcb · 2020-11-29T21:06:54.000-05:00
diff --git a/lib/base64-arraybuffer.js b/lib/base64-arraybuffer.js
@@ -11,7 +11,7 @@
   var chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
 
   // Use a lookup table to find the index.
-  var lookup = new Uint8Array(256);
+  var lookup = new Uint8Array(123); // max ASCII code in chars is 122
   for (var i = 0; i < chars.length; i++) {
     lookup[chars.charCodeAt(i)] = i;
   }

Original file line number	Diff line number	Diff line change
`@@ -11,7 +11,7 @@`
`11`	`11`	`var chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";`
`12`	`12`
`13`	`13`	`// Use a lookup table to find the index.`
`14`		`- var lookup = new Uint8Array(256);`
	`14`	`+ var lookup = new Uint8Array(123); // max ASCII code in chars is 122`
`15`	`15`	`for (var i = 0; i < chars.length; i++) {`
`16`	`16`	`lookup[chars.charCodeAt(i)] = i;`
`17`	`17`	`}`