Run results for: Hash Test

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:131.0) Gecko/20100101 Firefox/131.0

Browser: Firefox 131

Operating system: Linux

Device Platform: Desktop

Date tested: 17 days ago

Test name	Executions per second
regular	263070576.0 Ops/sec
asm	278024128.0 Ops/sec

Script Preparation code:

var alpha = "abcdefghijklmnopqrstuvwxyz";
var test = [];
for(var i = 0; i < 100000; i++){
 test.push(alpha[Math.random() * 26]); 
}

var testStr = test.join("");

function djb2Regular(str) {
    var hash = 5381;
    if (str == null) {
        return hash;
    }
    for (var i = 0; i < str.length; i++) {
        var char = str.charCodeAt(i);
        hash = ((hash << 5) + hash) + char; /* hash * 33 + c */
    }
    return hash;
}

function hashModule(stdlib, foreign, heap) {
  "use asm";

  function djb2Asm(str) {
    var hash = 5381;
    
    if (str == null) {
        return hash;
    }
  	var length = str.length | 0;
    for (var i = 0 | 0; i < length; i++) {
        var char = str.charCodeAt(i) | 0;
        hash = (((hash << 5) + hash) + char) | 0; /* hash * 33 + c */
    }
    return hash | 0;
}

  return { hash: djb2Asm };
}

var djb2Asm = hashModule(window, null, null).hash;

Tests:

regular
djb2Regular(testStr)
asm
djb2Asm(testStr)

regular

asm