perf: Avoid heap allocating each task during string merging#1286
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Rayon's task spawning heap-allocates each spawned task. This commit switches to using a crossbeam queue then uses rayon's par_bridge to consume it. This doesn't noticably affect runtime, but does slightly reduce many other measures like CPU cycles. Mostly it reduces heap allocations.
davidlattimore
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Nov 26, 2025
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Rayon's task spawning heap-allocates each spawned task. This commit switches to using a crossbeam queue then uses rayon's par_bridge to consume it.
This doesn't noticably affect runtime, but does slightly reduce many other measures like CPU cycles. Mostly it reduces heap allocations.