performance sign-off

[pixelzoom]

This is listed as a "standard GitHub issue" in the code-review checklist. The lead designer must sign off on performance.

[pixelzoom]

#60 and #140 are the 2 cases that were performance concerns. A lot of work was done to improve PhET-iO performance, and it now feels acceptable to me. So over to @amanda-phet for performance sign-off. I'm not quite sure how sign-off is going to work without access to PhET's test devices. Let me know if you want to discuss.

[amanda-phet]

@ariel-phet Can you also help sign off on this one? I've read the performance issues and commented, and if @pixelzoom thinks it's acceptable then I'm inclined to accept the current performance status. #140 is a little bit of a usability issue combined with performance, and #60 seems fine to me.

[amanda-phet]

Oops, #166 is the usability issue. They are so similar I confused them.

[ariel-phet]

Looked over the issues, I think all is in a good place (certainly for PhET brand). It sounds like @pixelzoom has some thoughts for potential optimizations as this sim gets moved towards the iO dev release, but I think even without those we would be in pretty solid shape.

Signing off and closing.