ashb commented on issue #6627: [AIRFLOW-5931] Use os.fork when appropriate to speed up task execution. URL: https://github.com/apache/airflow/pull/6627#issuecomment-557137953 And the effect on time to complete 10 DAG runs: Time for 10 dag runs with 40 tasks each: 803.298s (±8.5607s) vs with change Time for 10 dag runs with 40 tasks each: 473.165s (±13.7191s) A x1.69 change Time for 10 dag runs with 12 tasks each: 240.400s (±3.0390s) vs with change Time for 10 dag runs with 12 tasks each: 141.476s (±2.2151s) A x1.7 change
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