perf(zero-cache): add head-indexed queue helpers - #8
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Why: remove array shifting from hot subscription queues without replacing Greg's Queue and RingBuffer * add HeadIndexedQueue for richer peek and replace queue operations * use it inside Subscription's pending consumer/message queues * cover queue helper and Subscription cleanup behavior
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Replaced by rocicorp/mono PRs rocicorp#6070 through rocicorp#6078. |
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what changed
Adds
HeadIndexedQueuehelpers and moves subscription queue internals away from array shifting on hot paths.benchmark output
medium-wide-batch-pressure, 15s:This one is not a clean standalone E2E win in the single-consumer run. I kept it isolated because the helper is used by the following websocket batch PR, but it is reasonable to fold this into that PR if the team does not want a preparatory helper PR.
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