Greg Pomerantz
d990627200
The backlog must never delay on-screen work. Urgent jobs (real Chromium requests) are now stale-dropped too, not just prefetch: a fast fling queues urgent work for every band it crosses, and all of it except the final band is dead — it filled the queue cap and made fresh on-screen requests wait for the JS retry timer. Safe because the anchor now settles at the final scroll position (trailing send), and on-screen cells have idx >= VPORT so they can never be dropped. A pure LIFO would not fix this: stale jobs sit at the stack bottom, never popped, still blocking the cap. Emulator fling test: 309 stale urgent jobs purged, queue peak 28, all 850 decodable images loaded. |
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