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Close TD-15 task housekeeping

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Chili Palmer
2026-06-12 13:20:57 +02:00
parent ae66775cb7
commit f7e1662bca
3 changed files with 95 additions and 14 deletions
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TECHDEBTS.md
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@@ -590,7 +590,16 @@ polling in the rebuild wait path.
unchanged (or interval ≥ 1s with backoff); rebuild sequencing has no
`Process.sleep`; CLI-sync round-trip latency stays ≤ current behavior.
### TD-15: `BDS.Tasks` housekeeping (queue type, eviction timers)
### TD-15: `BDS.Tasks` housekeeping (queue type, eviction timers) ✅ DONE (2026-06-12)
**Status: implemented.** `BDS.Tasks` now uses `:queue` for its pending work
queue, so enqueue/dequeue on the hot path are O(1) and the FIFO behavior is
unchanged. Finished-task cleanup now tracks a single live eviction timer ref
instead of scheduling a fresh `send_after/3` on every terminal task; the timer
fires, prunes expired finished tasks, and only reschedules itself if finished
tasks still remain. Coverage now includes a focused task-state test proving
multiple finished tasks share the same live eviction timer and a source guard
that forbids `queue ++` churn.
**Context.** Minor inefficiencies in `tasks.ex`: the pending queue is a list
appended with `++` (O(n) per submit), and **every** finishing task schedules