Study ranks 10 HTTP job schedulers by timing accuracy, GitHub Actions lags far behind

Developers at smplkit tested ten HTTP job schedulers — including AWS EventBridge, Google Cloud Scheduler, Cloudflare Workers, and others — to measure how precisely each fires requests at the top of the hour. The team built a custom benchmarking tool, smplmark.org, after finding no existing platform suited to capturing arrival timestamps for scheduled HTTP requests. Each scheduler was configured on its free tier to POST a JSON payload every hour, with timing skew calculated as milliseconds past the hour. GitHub Actions performed so poorly it was removed from comparative charts to keep other results visible. The live results update hourly, and the team acknowledged methodology limitations including endpoint geography, Cloudflare's potential home-field advantage, and modulo-hour skew calculations.