Jerry
21 lines
608 B
JavaScript
21 lines
608 B
JavaScript
export async function mapWithConcurrency(items, concurrency, mapper) {
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const list = Array.isArray(items) ? items : [];
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const workerCount = Math.min(
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list.length,
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Math.max(1, Math.floor(Number(concurrency) || 1))
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);
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const results = new Array(list.length);
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let nextIndex = 0;
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async function runWorker() {
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while (nextIndex < list.length) {
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const currentIndex = nextIndex;
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nextIndex += 1;
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results[currentIndex] = await mapper(list[currentIndex], currentIndex);
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}
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}
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await Promise.all(Array.from({ length: workerCount }, () => runWorker()));
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return results;
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}
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