Scheduler punctuality lab

Who actually starts GitHub Actions on time?

This dashboard compares external schedulers against GitHub's native schedule: trigger by measuring total drift from the intended hourly slot to the moment GitHub creates the workflow run.

Current verdict

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Window
Best reliable external
GitHub native cron Control group
Samples

Latency

Median drift by scheduler

Signed logarithmic scale: second-level schedulers stay visible next to the minute-level GitHub control.

Hourly behavior

Drift over time

Each dot is one intended hourly slot. Red marks a failed workflow conclusion.

Ranked results

Leaderboard

Reliability is shown before latency because silently missing slots is worse than being a few seconds late.

Scheduler drift leaderboard. The table is the text equivalent for the charts.
Scheduler Runs Slots hit Median p90 Worst Failed
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