Performance Regression or Improvement: gbk_python_batch_load_test_fanout_4_times_with_2GB_10byte_records_total:runtime

[github-actions]

Performance change found in the
test: gbk_python_batch_load_test_fanout_4_times_with_2GB_10byte_records_total for the metric: runtime.

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Test description: GroupByKey Python Load test - fanout 4 times with 2GB 10-byte records total
python | GBK | Fanout 4
Test Dashboard - http://metrics.beam.apache.org/d/UYZ-oJ3Zk/gbk-load-tests?orgId=1&var-processingType=batch&var-sdk=python&from=now-90d&to=now&viewPanel=5
Test link -

beam/.test-infra/jenkins/job_LoadTests_GBK_Python.groovy

Line 106 in 5e38dec

test : 'apache_beam.testing.load_tests.group_by_key_test',

timestamp: Sat May 23 17:28:35 2026, metric_value: 96.00
timestamp: Fri May 22 17:52:57 2026, metric_value: 116.00
timestamp: Thu May 21 18:24:06 2026, metric_value: 108.00 <---- Anomaly
timestamp: Wed May 20 18:06:39 2026, metric_value: 59.00
timestamp: Tue May 19 18:08:34 2026, metric_value: 52.00
timestamp: Mon May 18 18:03:17 2026, metric_value: 89.00
timestamp: Sun May 17 17:30:46 2026, metric_value: 71.00
timestamp: Sat May 16 17:23:24 2026, metric_value: 72.00
timestamp: Fri May 15 17:48:57 2026, metric_value: 95.00
timestamp: Thu May 14 17:40:23 2026, metric_value: 70.00
timestamp: Wed May 13 17:57:04 2026, metric_value: 68.00
timestamp: Tue May 12 17:46:34 2026, metric_value: 85.00
timestamp: Mon May 11 18:04:01 2026, metric_value: 75.00