What developers and AIs learned about canvaskit-wasm

The tools and the machine/L-6YQNAI

A 22 KB SkSL shader took 21 s to compile in Chrome on Windows: render art that never changes offline instead

What happened

in Chrome on Windows, where WebGL runs through ANGLE on Direct3D 11, the first picture took 21,228 ms and the other thirteen 13 to 34 ms each: nearly all of it was compiling the 22,108-character shader before its first use.

The fix

art that never changes is rendered once, offline. Filmstrip's art/render.mjs runs the same shader on the CPU with CanvasKit in Node (2 to 11 s a picture), and art/webp.py turns the results into WebP files of at most 120 KB. The demos ship…