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Python(feat): batch measurement upload - #810
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October 1, 2026 16:55
A test-results log records one CreateTestMeasurement line per measurement, and replay sent one request for each. Measurements are the bulk of a log, so a large log took one round trip per measurement to upload. Replay now coalesces a run of consecutive measurement lines into one CreateTestMeasurements call. A run ends at the next non-measurement line, at the size guard, or at the end of the log, so lines still reach the server in log order and the cursor advances by the whole run once its call returns. On a 13,631-line log this takes the requests from 13,628 to 4,021, and the upload from about 12 minutes to about 3.5 at a 53ms round trip. The sidecar is written once per run rather than once per line, which cuts its cost with them. The log format does not change, so a log written by an earlier version gets the same speedup. Step creates and updates still take one request each.
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Summary
Replaying a test-results log batches consecutive measurement creates into one
CreateTestMeasurementscall instead of one call per measurement. On a 13,631-line log this cut the calls from 13,628 to 4,021 and the upload from about 12 minutes to about 3.5; step creates and updates still take one call each.SiftReplayReconciledWarning.