Created
December 4, 2023 04:23
-
-
Save alsotang/e3596524afb6acc24d46e25ca1f0a9c5 to your computer and use it in GitHub Desktop.
use requestAnimationFrame to calculate frameRate
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| <body> | |
| <script> | |
| // record every requestAnimationFrame interval and use them to calculate the average framerate. | |
| let frameRate = 0; | |
| let historyInterval = []; | |
| let historyIntervalLength = 200; | |
| let lastTime = Date.now(); | |
| requestAnimationFrame(function loop() { | |
| let now = Date.now(); | |
| let interval = now - lastTime; | |
| lastTime = now; | |
| historyInterval.push(interval); | |
| if (historyInterval.length > historyIntervalLength) { | |
| historyInterval.shift(); | |
| } | |
| frameRate = Math.round(1000 / (historyInterval.reduce((a, b) => a + b) / historyInterval.length)); | |
| requestAnimationFrame(loop); | |
| console.log(`frameRate`, frameRate) | |
| }); | |
| </script> | |
| </body> |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment