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phetsims / molecule-shapes

"Molecule Shapes" is an educational simulation in HTML5, by PhET Interactive Simulations.
http://phet.colorado.edu/en/simulation/molecule-shapes
GNU General Public License v3.0
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Potential iPad Crashes #206

Closed KatieWoe closed 1 year ago

KatieWoe commented 2 years ago

For https://github.com/phetsims/qa/issues/745 When using ?showPointerAreas on iPadOS 15, the sim crashed and reloaded after a few minutes of use. It also did it fairly quickly a second time (still with the parameter). I did see it again with ?stringTest=X. This type of crashing and reloading has been seen before on older iOSs and tended to be when the sim was using more resources. I also know that ?showPointerAreas at least can decrease performance. The fact that it happened with ?stringTest=X seems more odd to me. I wasn't able to find any particular action that caused this. It could happen on the home screen or while rotating a molecule in the sim.

stemilymill commented 2 years ago

I have been unable to reproduce this on iPad Pro with iPadOS 15.1

jonathanolson commented 2 years ago

I have an iPad with iOS 9.3.5 which seems old enough that it's not loading (says "Your software is up to date."). Looks like an iPad 2 (Lave).

I'm curious if it's a memory issue, or possibly a GPU issue (dealing with 3d), or some other issue. To debug, I'd probably need to reproduce while tethered.

@kathy-phet thought on priority? I'd probably need an in-person device in order to reproduce/debug (I'm curious about what the limits on newer iPads are, so that we don't break this with future sims).

arouinfar commented 1 year ago

@jonathanolson this issue seems a bit stale. Let's plan on asking QA to reproduce in the next dev test. If it's still an issue, we can discuss next steps.

samreid commented 1 year ago

I tested a built version on iPad on iOS 15.6.1 with ?stringTest=x and used it for about 6 minutes, dragging molecules, creating molecules, tapping checkboxes, pinch to zoom, etc. It did not crash and is still running nicely. Closing for now, but please reopen or create a new issue if this recurs.