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Simon Marlow authored
Having a timer signal go off regularly is bad for power consumption, and generally bad practice anyway (it means the app cannot be completely swapped out, for example). Fortunately the threaded RTS already had a way to detect when the system was idle, so that it can trigger a GC and thereby find deadlocks. After performing the GC, we now turn off timer signals, and re-enable them again just before running any Haskell code.
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