Tracking: Optimizations

[nicoburns]

Optimizations

This issue tracks improvements that target resource usage: cpu, memory, binary size, etc.

Performance

• Optimise style diffing (ptr comparisons)
• Paint culling for non-root-viewport
• DOM "event presence" optimisation (bitmap?)
• Limit damage to formatting context where appropriate
• Make use of REPAINT damage (don't repaint if no damage)

Memory usage

• Stop using taffy::Style
• Fix known memory leaks
  • Anonymous nodes
  • Parley font names

Binary size

• Port resvg to fontations