Andreas Kling a141c2c492 LibWeb+AK: Use AK::Queue for the microtask queue ...

The microtask queue is a pure FIFO (enqueue at back, dequeue from
front) but was using a Vector, making every dequeue O(n) due to
element shifting.

Replace it with AK::Queue which has O(1) dequeue. This makes a huge
difference when processing large numbers of microtasks, e.g. during
async-heavy JavaScript workloads where each `await` generates a
microtask.

Also add a for_each() method to AK::Queue so the GC can visit the
queued tasks.

2026-03-16 09:38:20 +01:00

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