The parallel future of the browser
summary
Browsers must become parallel to meet new display and app demands: moving from 60fps (about 16 milliseconds to paint ~4 million pixels on a 13" MacBook Pro) to 120fps (8 milliseconds for ~3 million pixels on the new iPad) and VR (90fps, ~11ms for ~16.5 million pixels) breaks single-threaded rendering. Mozilla has spent a decade rearchitecting rendering with parallelism inside Firefox and reports concrete performance wins from those changes, showing the approach works.
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