I currently have this encoding function which simply subtracts one from each character code:String.fromCharCode.apply(null, text.split().map(function(v) {    return v.charCodeAt() - 1;}));E.g. test becomes sdrs.I know that this function is silly because it isn't a strong encoding algorithm, but that's not my point. The problem is that it is slow and causes a stack overflow for large strings (~130.000 in length).I tried a regexp but that's even slower:text.replace(/./g, function(v) {    return String.fromCharCode(v.charCodeAt() - 1);});I tested both on jsPerf.Currently, I'm executing a function for each character in both functions. How can I make a function that does the same thing as what these functions are doing, but executes fast without stack overflows?
Making an encoding function faster
javascript;strings;performance
Try looping through it with a simple for loop:var b = '';for (var i = 0; i < a.length; i++){   b += String.fromCharCode(a.charCodeAt(i) - 1)}return b;