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OrcaWinandOrcaWin
b252aef0cf
Rolldown defaults to 1.5x physical cores Tokio workers plus a Rayon pool per logical CPU (24+24 here). Capping both at 8 on >8-core hosts cuts electron-vite build CPU 24% with byte-identical output. pnpm dev no longer blocks on a stale pairing web build; it stages into out/.web-next and swaps on success. Co-authored-by: OrcaWin <293788423+OrcaWin@users.noreply.github.com>
17 lines
618 B
JavaScript
17 lines
618 B
JavaScript
import os from 'node:os'
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// Measured on 24 threads: Rolldown's default 24+24 workers cost ~25% more CPU than 8 for no wall-time gain.
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const maxRolldownThreads = '8'
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/** Caps Rolldown's Tokio and Rayon pools on large hosts unless the caller already chose sizes. */
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export function withRolldownThreadLimit(env, availableParallelism = os.availableParallelism()) {
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if (availableParallelism <= Number(maxRolldownThreads)) {
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return env
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}
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return {
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...env,
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ROLLDOWN_WORKER_THREADS: env.ROLLDOWN_WORKER_THREADS ?? maxRolldownThreads,
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RAYON_NUM_THREADS: env.RAYON_NUM_THREADS ?? maxRolldownThreads
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}
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}
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