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Tracking: Optimizations #255

Description

@nicoburns

Optimizations

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

Performance

  • Optimise style diffing (ptr comparisons)
  • DOM "event presence" optimisation (bitmap?)
  • Paint culling for non-root-viewport
  • 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

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