# Really weird bug with chrome on android

**URL:** <https://discourse.threejs.org/t/really-weird-bug-with-chrome-on-android/39298>\
**Category:** Questions\
**Tags:** chrome\
**Created:** [June 16, 2022, 12:52am UTC](https://discourse.threejs.org/t/really-weird-bug-with-chrome-on-android/39298 "2022-06-16T00:52:42Z")\
**Posts on this page:** 8\
**Page:** 1

<div class="post-metadata">

**Author:** ![naive17](https://yyz1.discourse-cdn.com/flex035/user_avatar/discourse.threejs.org/naive17/32/27138_2.png) [@naive17](https://discourse.threejs.org/u/naive17)\
**Post date:** [June 16, 2022, 12:52am UTC](https://discourse.threejs.org/t/really-weird-bug-with-chrome-on-android/39298/1 "2022-06-16T00:52:42Z")

</div>

Hi there!  
I found a really annoying and random bug that pops up every since and then only on chrome (and chrome based) browsers on android.  
I have a complex but optimized scene and on firefox runs well as well from other browsers.

Only on chrome for android sometimes the fps drops to 8/9 only to return to 60 if either refresh the page, lock and unlock my screen or just go away from the current browser tab and then return back to my app tab.

It’s really really weird and i can’t help solving this so i’m trying to ask if anyone encountered something similar

What i noticed is that the updateMatrixWorld and renderObject functions take up x4 time before the tricks i said before.  
The performance gain is instant as soon as you blur and then focus the tab and i’m really confused

---

<div class="post-metadata">

**Author:** ![Umbawa\_Sarosong](https://yyz1.discourse-cdn.com/flex035/user_avatar/discourse.threejs.org/umbawa_sarosong/32/30107_2.png) [@Umbawa\_Sarosong](https://discourse.threejs.org/u/Umbawa_Sarosong)\
**Post date:** [June 16, 2022, 7:07am UTC](https://discourse.threejs.org/t/really-weird-bug-with-chrome-on-android/39298/2 "2022-06-16T07:07:30Z")

</div>

that’s not a bug, the lags is normally experienced with older model or low specification mobiles.

---

<div class="post-metadata">

**Author:** ![naive17](https://yyz1.discourse-cdn.com/flex035/user_avatar/discourse.threejs.org/naive17/32/27138_2.png) [@naive17](https://discourse.threejs.org/u/naive17)\
**Post date:** [June 16, 2022, 7:36am UTC](https://discourse.threejs.org/t/really-weird-bug-with-chrome-on-android/39298/3 "2022-06-16T07:36:23Z")

</div>

Sorry but you did not read through the question 😔

I have a ok phone, no lag in firefox, lags only on chrome and if i lock the screen/unlock it or change the tab briefly the threejs app goes back to 60fps.

---

<div class="post-metadata">

**Author:** ![Mugen87](https://yyz1.discourse-cdn.com/flex035/user_avatar/discourse.threejs.org/mugen87/32/5645_2.png) [@Mugen87](https://discourse.threejs.org/u/Mugen87)\
**Post date:** [June 16, 2022, 7:40am UTC](https://discourse.threejs.org/t/really-weird-bug-with-chrome-on-android/39298/4 "2022-06-16T07:40:55Z")

</div>

That sounds like a Chromium bug to me. Consider to report this issue here:

[https://bugs.chromium.org/p/chromium/issues/list](https://bugs.chromium.org/p/chromium/issues/list)

---

<div class="post-metadata">

**Author:** ![Umbawa\_Sarosong](https://yyz1.discourse-cdn.com/flex035/user_avatar/discourse.threejs.org/umbawa_sarosong/32/30107_2.png) [@Umbawa\_Sarosong](https://discourse.threejs.org/u/Umbawa_Sarosong)\
**Post date:** [June 16, 2022, 8:17am UTC](https://discourse.threejs.org/t/really-weird-bug-with-chrome-on-android/39298/5 "2022-06-16T08:17:33Z")

</div>

thats is just normal, even with opera mobile, if u load ordinary website like fb and open a new tab then shift back to facebook tab u will notice a lag, it may not be as obvious as threejs project but there is lag shifting from one tab to the other, locking and unlocking the screen puts the cpu to minimum this makes the lag more obvious than just shifting tabs.

---

<div class="post-metadata">

**Author:** ![naive17](https://yyz1.discourse-cdn.com/flex035/user_avatar/discourse.threejs.org/naive17/32/27138_2.png) [@naive17](https://discourse.threejs.org/u/naive17)\
**Post date:** [June 16, 2022, 8:34am UTC](https://discourse.threejs.org/t/really-weird-bug-with-chrome-on-android/39298/6 "2022-06-16T08:34:58Z")

</div>

@Umbawa_Sarosong  
No, it’s literally the other way.  
The app will start lagging, if you switch briefly tab it will get to 60 fps, only on chrome!

---

<div class="post-metadata">

**Author:** ![naive17](https://yyz1.discourse-cdn.com/flex035/user_avatar/discourse.threejs.org/naive17/32/27138_2.png) [@naive17](https://discourse.threejs.org/u/naive17)\
**Post date:** [June 16, 2022, 8:35am UTC](https://discourse.threejs.org/t/really-weird-bug-with-chrome-on-android/39298/7 "2022-06-16T08:35:29Z")

</div>

Thanks! I will open it now!

---

<div class="post-metadata">

**Author:** ![Umbawa\_Sarosong](https://yyz1.discourse-cdn.com/flex035/user_avatar/discourse.threejs.org/umbawa_sarosong/32/30107_2.png) [@Umbawa\_Sarosong](https://discourse.threejs.org/u/Umbawa_Sarosong)\
**Post date:** [June 16, 2022, 8:35am UTC](https://discourse.threejs.org/t/really-weird-bug-with-chrome-on-android/39298/8 "2022-06-16T08:35:52Z")

</div>

its probably chrome bug,