Performance Regression or Improvement: cogbk_python_batch_load_test_2GB_of_100B_records_with_a_single_key:runtime

[github-actions]

Performance change found in the
test: cogbk_python_batch_load_test_2GB_of_100B_records_with_a_single_key for the metric: runtime.

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Test description: CoGroupByKey Python Load test - 2GB of 100B records with a single key
python | coGBK | 100B records with a single key
Test Link - https://github.com/apache/beam/blob/5e38decf9e723a385057131b01bbd33d8c60bda3/.test-infra/jenkins/job_LoadTests_coGBK_Python.groovy#L32C25-L32C76
Test Dashboard - http://metrics.beam.apache.org/d/fK0U4JqWz/cogbk-load-tests?orgId=1&var-processingType=batch&var-sdk=python&viewPanel=2

timestamp: Thu Jun 18 16:34:13 2026, metric_value: 157.00
timestamp: Wed Jun 17 16:39:51 2026, metric_value: 157.00
timestamp: Tue Jun 16 17:03:57 2026, metric_value: 174.00 <---- Anomaly
timestamp: Mon Jun 15 17:07:24 2026, metric_value: 247.00
timestamp: Sun Jun 14 16:02:50 2026, metric_value: 251.00
timestamp: Sat Jun 13 16:00:43 2026, metric_value: 253.00
timestamp: Fri Jun 12 16:35:23 2026, metric_value: 240.00
timestamp: Thu Jun 11 16:51:19 2026, metric_value: 292.00
timestamp: Wed Jun 10 16:38:45 2026, metric_value: 188.00
timestamp: Tue Jun  9 16:33:36 2026, metric_value: 225.00
timestamp: Mon Jun  8 16:50:47 2026, metric_value: 201.00
timestamp: Sun Jun  7 15:57:23 2026, metric_value: 273.00
timestamp: Sat Jun  6 16:02:20 2026, metric_value: 205.00