# Requests about how to set max fps below 60

onBeforeRenderObservable, animations, and anythings that are bound to the frame and executed Beyond 60, the behavior becomes erratic (ex When it was a, running became very fast, walking stopped at 165hz)
so want something like engine.setMaximumFps = 60 ( at least 30)
it is possible?

You can use engine.getDeltaTime() or scene.getAnimationRatio() to ensure your animations play back at the same speed on all devices.

You could also simply render once on every 2 RequestAnimationFrame Sorry for the slow response.
Here’s the example where I’m having the problem:
a is 1000/60 = It is assumed that 60 frames per second are forced.
time = realTime
testTime = delayed Time

``````        let a = 0;
let delta, testTime = 0;
let time =0;

delta= engine.getDeltaTime();
time += delta;
testTime += delta;
if(time >=0.016) {
time = 0;
a++;
if(a >600){
console.log(`check:  \${testTime}`);
a = 0;
}
}
})
``````

60fps 165fps a = 1000/165 ← Is there a way to explicitly get the user’s frames?

## 165fps

let a = 0;

``````let gameLogic = (lastTime) => {
a++;
if(a >=600){
console.log(`check:  \${lastTime}`);
a = 0;
}
}

let desiredFps = 60;
let interval = 1000 / (10*desiredFps);
let lastTime = performance.now();

function loop() {
window.requestAnimationFrame(loop)
let currentTime = performance.now();
const deltaTime = currentTime - lastTime;
if (deltaTime > interval) {
lastTime = currentTime - (deltaTime % interval);
gameLogic(lastTime);
}
}
loop();
`````` or
let a =0;

``````let start = new Date().getTime();

let gameLogic = () => {

a++;

if (a >= 600) {

let end = new Date().getTime();

console.log(`check:  \${end - start}`);

a = 0;

}

}

let desiredFps = 60;

let interval = 1000 / (10 * desiredFps);

let lastTime = performance.now();

function loop() {

window.requestAnimationFrame(loop)

let currentTime = performance.now();

const deltaTime = currentTime - lastTime;

if (deltaTime > interval) {

lastTime = currentTime - (deltaTime % interval);

gameLogic();

}

}

loop();
`````` Did I get it wrong?

Overall I understand.
I understood the logical relationship between explicitly controlling the fps based on the delay in time, but I thought it was more expensive than I thought when I changed all the logic in this form.
so I’ll modify the recommendation to use 60 fps.