search

scratchfoundation / scratch-flash

Open source version of the Scratch 2.0 project editor. This is the basis for the online and offline versions of Scratch found on the website.
https://scratch.mit.edu
GNU General Public License v2.0
1.33k stars 512 forks source link

Stage3D causes excessive GPU usage #1402

Closed TheLogFather closed 5 years ago

TheLogFather commented 6 years ago

...even without any scripts running.

Steps to reproduce:

  1. create new project
  2. delete cat sprite (just so we know it's not specifically to do with a sprite)
  3. watch GPU usage for browser/Flash, and see it's low
  4. drag "set/change color effect" block into scripting area
  5. watch GPU usage go up
  6. change block from "color" to "brightness" effect
  7. watch GPU usage go down

This happens for me on Mac in Safari, FF & Chrome.

Not checked Windows(/Linux).

Kenny2github commented 6 years ago

Windows 10, Chrome 68, CPU Intel(R) Core(TM) i3-4012Y CPU @ 1.50GHz, GPU Intel(R) HD Graphics Family

Following those steps, I saw no significant change in CPU usage (remaining around ~20%) with or without the graphic effect block. However, my GPU usage shot from ~2% to ~30% when I dragged the effect block in, then dropped back down to ~2% when I dragged it out.

TheLogFather commented 6 years ago

Hmmm, interesting, you're right...

I should've noticed I was actually using the activity monitor app set to show "Energy impact" rather than specifically monitoring CPU.

–That's probably why I didn't notice this usage before (I usually use "top" in terminal).