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fix(runtime): restore hot TLS for arena right-sizing #9736

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fix(runtime): restore hot TLS for arena right-sizing #9736

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fd33fc6
fix(runtime): use hot TLS for arena right-sizing
Sep 4, 2026
ec622b2
docs(changelog): correct workload units
Sep 4, 2026
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6 changes: 3 additions & 3 deletions changelog.d/9731-arena-right-sizing.md
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Expand Up @@ -14,7 +14,7 @@ stays disarmed until utilization reaches 70% or capacity grows materially
into a periodic full-GC loop.

On the compiled Claude Code 2.1.112 workload from the report, arena capacity
fell from 96.5 MiB before the episode to 36.7 MiB, then 35.7 MiB and 35.7 MiB
across a five-minute idle soak with about 23 MiB live. RSS fell from 401 MiB at
the first census to 132 MiB at the last, and exactly one idle full was attributed
fell from 96.5 MB before the episode to 36.7 MB, then 35.7 MB and 35.7 MB
across a five-minute idle soak with about 23 MB live. RSS fell from 401 MB at
the first census to 132 MB at the last, and exactly one idle full was attributed
to arena right-sizing.
2 changes: 1 addition & 1 deletion crates/perry-runtime/src/gc/arena_right_size.rs
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Expand Up @@ -82,7 +82,7 @@ struct ArenaRightSizeState {
last_usage: ArenaUsage,
}

thread_local! {
crate::perry_thread_local! {
static STATE: RefCell<ArenaRightSizeState> =
RefCell::new(ArenaRightSizeState::default());
#[cfg(test)]
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