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Mitchell Hashimoto Quantifies the Compute Amplification of a Single Commit: 200+ CI Jobs and 20% Overnight CPU on an Idle Laptop
In an Aug 16 post (1,978 likes) Hashimoto compared his 2026 workflow to 2006: one push now fans out to 200+ CI jobs across macOS, Linux and Windows taking ~20 minutes, triggers ~8 beefy machines for tip releases, then Apple notarization machines — plus dedicated fuzzing boxes at 100% CPU 24/7. The detail builders will recognize: his M4 Max averaged over 20% CPU utilization overnight for seven straight days because of background agents, where it used to be 0% in deep sleep. He explicitly declines to moralize about it, framing it only as an astonishing shift in compute-per-commit.
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