# Unstable Frame Rates

**URL:** https://forum.kirupa.com/t/unstable-frame-rates/316484
**Category:** flash
**Created:** [November 23, 2010, 6:40am UTC](https://forum.kirupa.com/t/unstable-frame-rates/316484 "2010-11-23T06:40:09Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![ChaoSXDemon](https://avatars.discourse-cdn.com/v4/letter/c/b38774/32.png) [@ChaoSXDemon](https://forum.kirupa.com/u/ChaoSXDemon)
#### Post date: [November 23, 2010, 6:40am UTC](https://forum.kirupa.com/t/unstable-frame-rates/316484/1 "2010-11-23T06:40:09Z")

</div>

Why is Flash’s frame rate so unstable? I have set it to 60 FPS and here is my output frame rate:

```auto
FPS: 76.92307692307692
FPS: 500
FPS: 58.8235294117647
FPS: 83.33333333333333
FPS: 55.55555555555556
FPS: 55.55555555555556
FPS: 71.42857142857143
FPS: 55.55555555555556
FPS: 62.5
FPS: 55.55555555555556
FPS: 62.5
FPS: 62.5
FPS: 55.55555555555556
FPS: 62.5
FPS: 62.5
FPS: 55.55555555555556
FPS: 62.5
FPS: 62.5
FPS: 55.55555555555556
FPS: 62.5
FPS: 62.5
FPS: 55.55555555555556
FPS: 62.5
FPS: 62.5
FPS: 55.55555555555556
FPS: 62.5
FPS: 62.5
FPS: 55.55555555555556
FPS: 62.5
FPS: 62.5
FPS: 55.55555555555556
FPS: 62.5
FPS: 62.5
FPS: 55.55555555555556
FPS: 62.5
FPS: 62.5
FPS: 55.55555555555556
FPS: 62.5
FPS: 62.5
FPS: 55.55555555555556
FPS: 62.5
FPS: 62.5
FPS: 55.55555555555556
FPS: 62.5
FPS: 62.5
FPS: 55.55555555555556
FPS: 62.5
FPS: 62.5
FPS: 55.55555555555556
FPS: 62.5
FPS: 62.5
FPS: 55.55555555555556
FPS: 62.5
FPS: 62.5
FPS: 55.55555555555556

```

The frame rate is measured by code in my other [[COLOR=“Red”][SIZE=“3”]thread[/SIZE][/COLOR]](http://www.kirupa.com/forum/showthread.php?t=357279)

And I am not doing much, only a tiny physics engine simulating 1 object moving upward with no other forces other than initial acceleration which is (0, -100)