Slow performance with Electron 10

[UnchartedBull]

touchscreen seems to be noticeably slower after a157708.

• Could be linked to *::before and *::after selectors.
• Seems to be better while printing, which would support the pseudo-selector thesis, since there are less elements present while printing.

[UnchartedBull]

traced back to Electron 10 upgrade. Current master runs fine with Electron 9. Needs further investigation.

[TheNeskik]

Could it be linked to Hardware Acceleration ?

I'll try this weekend to add
app.disableHardwareAcceleration();
to main.js

(Post this comment here as a remember for me)

[UnchartedBull]

Can be, I just tried another dev build the other day and enabled the Fake KMS OpenGL driver for the Raspberry (which in fact enables GPU accelerated CSS). The performance was still sup-bar and probably a little worse than Electron 9 with no Hardware Acceleration. Electron 9 with hardware accelerated CSS was butter-smooth, so I think there is something else going on. But I never tried to disableHardwareAcceleration from Electron directly because it does give a notable performance improvement with the CSS animations.

[UnchartedBull]

I found a few more things which could be the cause of this issue:

• browserWindow.backgroundThrottling might be something to look into (set to false)
• browserWindow.webgl Raspberry doesn't support WebGL out of the box, so disabling this might be worth a try as well
• try building with a higher version of node, this probably won't have any effect whatsoever but it is worth a try. I'm currently building everything with 12.16.1, while Electron 10 uses 12.16.3. So trying to build everything with 15 might be something to try.

Those three points probably won't do much, but I wanted to write them down somewhere and they might be worth a try.

[Vamoss]

Could it be linked to Hardware Acceleration ?

I'll try this weekend to add app.disableHardwareAcceleration(); to main.js

(Post this comment here as a remember for me)

This saved me hooooours of work trying to figure out why my application was so slow when running on touchscreen.
Thank you!