Benchmark: the cost of eventListeners

Script Preparation code:

var audio = document.createElement("audio");

function andAOne(e){ 
  e.count = (e.count|| 0) +1; 
}

function stop501(e){ 
  e.count === 501 && e.stopPropagationImmediately();
}

Tests:

running async 1000 event listeners
for (var i = 0; i <1000; i++) audio.addEventListener("ratechange",andAOne.bind({})); audio.playbackRate = 2;
running async 501 event listeners
for (var i = 0; i <1000; i++) audio.addEventListener("ratechange",andAOne.bind({})); audio.addEventListener("ratechange",stop501); audio.playbackRate = 2;

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
running async 1000 event listeners
running async 501 event listeners

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 3 years ago)

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/84.0.4147.125 Safari/537.36

Browser/OS: Chrome 84 on Linux

View result in a separate tab

Test name	Executions per second
running async 1000 event listeners	2.4 Ops/sec
running async 501 event listeners	0.8 Ops/sec

the cost of eventListeners (version: 0)

meassuring the cost of just calling an event listener.

Comparing performance of: running async 1000 event listeners vs running async 501 event listeners

Created: 3 years ago by: Guest

Jump to the latest result

running async 1000 event listeners

running async 501 event listeners

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A