31 lines
512 B
Go
31 lines
512 B
Go
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package batch
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import (
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"sync"
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)
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func ParallelProcess[T any, Z any](items []T, concurrency int, cb func(item T) Z) []Z {
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if len(items) == 0 {
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return []Z{}
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}
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if len(items) == 1 {
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return []Z{cb(items[0])}
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}
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results := make([]Z, len(items))
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wg := sync.WaitGroup{}
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sem := make(chan struct{}, concurrency)
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for i, item := range items {
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wg.Add(1)
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sem <- struct{}{}
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go func(item T) {
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defer func() {
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wg.Done()
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<-sem
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}()
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results[i] = cb(item)
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}(item)
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}
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wg.Wait()
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return results
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}
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