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Sandboxes · 14 November 2026

A paused sandbox wakes for its own timers

A sandbox paused after its idle seconds wakes by itself shortly before the soonest timer of one of its processes is due: a sleep, a poll or wait with a timeout, a timerfd, alarm() or timer_create() that was pending the whole time it sat idle. A loop that polls every ten minutes, or sleep 600 && ./next.sh, now runs on time instead of waiting for the next call. Each such wake is billed as any wake. A timer armed and fired again and again while the sandbox was idle wakes nothing, and a sandbox you paused yourself never wakes on its own.

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