Use Konva.FastLayer for drawing waveforms

[jdelStrother]

FastLayer doesn’t support, eg, hit-testing, which makes it way faster when rendering large waveforms.

[chrisn]

Interesting, do you have any advice on how to test the performance improvement?

[jdelStrother]

I was mostly manually inspecting it using Chrome's Timeline tab, especially while zooming in & out of hour-long mp3s. Time was split roughly equally between drawScene and drawHit - the latter disappears with FastLayer.

[chrisn]

Yes, I see the difference. Nice change, thank you!