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phetsims / build-a-molecule

"Build a Molecule" is an educational simulation in HTML5, by PhET Interactive Simulations.
GNU General Public License v3.0
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Early loading screen delay #114

Closed KatieWoe closed 4 years ago

KatieWoe commented 4 years ago

Test device Dell Operating System Win 10 Browser Chrome Problem description For https://github.com/phetsims/QA/issues/459 Note that this is documented/recorded from one of our faster platforms. The sim has so far shown acceptable if slow load times. However, the progress bar does not seem to move at all until the very end. This gives the impression for a few seconds that the sim is not loading at all.

Visuals severalseconds

Troubleshooting information:

!!!!! DO NOT EDIT !!!!! Name: ‪Build a Molecule‬ URL: https://phet-dev.colorado.edu/html/build-a-molecule/0.0.0-dev.23/phet/build-a-molecule_all_phet.html Version: 0.0.0-dev.23 2019-11-20 23:29:39 UTC Features missing: touch Flags: pixelRatioScaling User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3904.97 Safari/537.36 Language: en-US Window: 1536x722 Pixel Ratio: 2.5/1 WebGL: WebGL 1.0 (OpenGL ES 2.0 Chromium) GLSL: WebGL GLSL ES 1.0 (OpenGL ES GLSL ES 1.0 Chromium) Vendor: WebKit (WebKit WebGL) Vertex: attribs: 16 varying: 30 uniform: 4096 Texture: size: 16384 imageUnits: 16 (vertex: 16, combined: 32) Max viewport: 32767x32767 OES_texture_float: true Dependencies JSON: {}
Denz1994 commented 4 years ago

@KatieWoe Could you compare this loading time to a lower-end device?

KatieWoe commented 4 years ago

6 or so seconds on Win 7 IE. Acceptable for IE, but still looks like nothing as progressing as above.

Denz1994 commented 4 years ago

The stall at the beginning is due the data set being loaded. From the design meeting on 11/27/19 and https://github.com/phetsims/build-a-molecule/issues/109#issuecomment-559224124 we aren't going to proceed with truncating the data set.

If the only issue is that it looks like the sim isn't loading, I would argue that the sim loading bar has a subtle dimming and brightening to its outline and that is enough indication that the sim is still loading.

@arouinfar Maybe it would be worth deciding if this is a problem during interviews? Otherwise, we could close this issue.

arouinfar commented 4 years ago

The gif doesn't look unreasonable to me. I understand that the load time is even longer for win7 devices, but I still think it's acceptable. Windows 7 is a month out from its end-of-life, and the devices running it are likely old and slow at this point. It shouldn't be particularly surprising to users that the sim loads slowly. I think we can go ahead and close this @Denz1994.