Run results for: Object key vs Array Filter

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.110 Safari/537.36

Browser: Chrome 96

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
Find from array using function reference	52719.5 Ops/sec
Find by object keys	122608.8 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