[KongchangAI]
Unverified50% confidenceBenchmarkExact time

仅调整 num_workers、pin_memory、prefetch_factor 三个 DataLoader 参数，相同 2000 步训练耗时从 633 秒降至 358 秒，运行时间缩短 43%

1
Sources
50%
Confidence
Long-term
Relevance
7/15/2026
First Seen

Sources

Is Your Training Job Quietly Slowing Down? TraceML Exposes PyTorch's Hidden Performance Bottlenecks

Related Claims

UnverifiedAt the thousand-GPU scale, the latency of a single AllReduce operation can account for more than 30% of the per-step training time.74% similar

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