Run results for: Object key vs Array Filter

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 17_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/121.0.6167.171 Mobile/15E148 Safari/604.1

Browser: Chrome Mobile iOS 121

Operating system: iOS 17.2

Device Platform: Mobile

Date tested: 2 years ago

Benchmark engine: Benchmark.js

Find by object keys

322K/s

Find from array using function reference

67K/s

View exact numbers

Test name	Executions per second
✓ Find by object keys	322,195 Ops/sec
Find from array using function reference	67,375 Ops/sec

Script Preparation code:

var arrayHandlers = [];
var objectHandlers = {};

var handlersCount = 100;

var functionHandlersToFind = [];
var hashesToFind = [];

var generateHash = function(ix) {
    return 'hdl' + ix;
}

var createHandler = function() {
    return function(data) {
        return "#Count:" + data;
    }
};

for (let i = 0; i < handlersCount; i++) {
    let theNewHandler = createHandler();
    arrayHandlers.push(theNewHandler);
    functionHandlersToFind.push(theNewHandler);
    let generatedHash = generateHash(i);
    objectHandlers[generatedHash] = theNewHandler;
    hashesToFind.push(generatedHash);
}

Tests:

Find from array using function reference
functionHandlersToFind.forEach((fnHandler) => arrayHandlers.find(handler => handler === fnHandler))
Find by object keys
hashesToFind.forEach((hash, ix) => objectHandlers[hash])

Run results for: Object key vs Array Filter

Access an stored element through object property key vs array filtering. Util for handlers references, when you need to store handlers and have acces for them later.

Find from array using function reference

Find by object keys