Shrink JsWorkerRequest & use the right HashMap/Set
#4150
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Centril
requested review from
bfops,
cloutiertyler and
jdetter
as code owners
bfops
approved these changes
Jan 28, 2026
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bfops
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bfops
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my code-owned changes (CLI) look good to me, although I don't know that this distinction really matters in there since it's very not-performance-sensitive.
I don't think I'm the right reviewer for most of the rest of the codebase.
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Description of Changes
This PR shrinks
JsWorkerRequestso that it is (almost) as small as the call reducer request.To do that, a bunch of trivial changes had to be done to auth code, that mostly revolves around
String->Box<str>.This should help the auth code, but that is incidental.
The main goal was to improve throughput through the request tx/rx channel for V8, which is taking quite a bit of time in flamegraphs.
I also noticed while making this change that the wrong hash map was being used in a bunch of places, so I fixed all of those.
A follow up PR will shrink the reply side to fit within a cache line.
Yet another follow up PR will change the channel to replace flume with
fibre::spsc.API and ABI breaking changes
None
Expected complexity level and risk
2, fairly trivial changes.
Testing
Covered by existing tests.