PrefectHQ/prefect - CodSpeed

prefect

Blog Docs Changelog

Performance History

Latest Results

Support AnyIO 4.14 task group interface

codex/anyio-414-gather-task-group

1 hour ago

Fix stale EventLoopThread globals after fork causing subprocess deadlocks After fork(), _reset_after_fork_in_child() resets each EventLoopThread instance's internal state (_loop = None) but did not clear the module-level _global_loop and _run_sync_loop references. get_run_sync_loop() and get_global_loop() check thread.is_alive() and .running, both of which incorrectly return True for the dead-but-inherited thread (the tstate lock from the parent thread is still held in the child, so is_alive() never flips to False). The stale instance was therefore returned, and its submit() path called start() on the already-started Thread object, raising RuntimeError and killing the subprocess silently. This caused intermittent 90-second timeouts in the concurrency lease integration tests: the test forks a subprocess to acquire and renew a lease, but if the pytest-xdist worker had previously created a run-sync loop (from an earlier test), the forked child inherited the stale reference and crashed before ever acquiring the lease. Fix: clear _global_loop and _run_sync_loop to None in the fork handler so the getter functions create fresh EventLoopThread instances in the child process. Co-Authored-By: bot_apk <apk@cognition.ai>

devin/1781629375-fix-fork-stale-loop-refs

1 hour ago

Add cancelling timeout cleanup producer (#22238)

main

2 hours ago

fix: use single backticks in docstrings per repo convention

devin/1781621778-fix-perpetual-service-recovery

3 hours ago

Make cancelling timeout cleanup enqueue recoverable

alexs/oss-7942-oss-07-oss-cancelling-timeout-producer

4 hours ago

Share orchestration clients across automation actions Every triggered automation action constructed a fresh OrchestrationClient (or PrefectServerEventsAPIClient), each of which built a new httpx ASGITransport, called create_app(), and re-ran Settings.hash_key() + setup_logging(). Flamegraphs against a trigger-heavy server show this costing ~7% CPU per action. Cache one open client per (subclass, settings identity) and inject the per-automation Prefect-Automation-ID / Prefect-Automation-Name headers through a contextvar-driven httpx request hook, so per-call tagging is preserved without paying the construction cost on every action. The existing `async with await self.orchestration_client(...)` callsites are unchanged. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

fatih-acar:share-orchestration-clients

7 hours ago

Share orchestration clients across automation actions Every triggered automation action constructed a fresh OrchestrationClient (or PrefectServerEventsAPIClient), each of which built a new httpx ASGITransport, called create_app(), and re-ran Settings.hash_key() + setup_logging(). Flamegraphs against a trigger-heavy server show this costing ~7% CPU per action. Cache one open client per (subclass, settings identity) and inject the per-automation Prefect-Automation-ID / Prefect-Automation-Name headers through a contextvar-driven httpx request hook, so per-call tagging is preserved without paying the construction cost on every action. The existing `async with await self.orchestration_client(...)` callsites are unchanged. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

fatih-acar:share-orchestration-clients

9 hours ago

fix(server): snapshot block registry before iterating in auto-registration (#22297) Co-authored-by: Alexander Streed <ajstreed1@gmail.com>

main

21 hours ago

Latest Branches

0%

[codex] Support AnyIO 4.14 task group interface#22309

1 hour ago

759b86d

codex/anyio-414-gather-task-group

0%

Fix stale EventLoopThread globals after fork causing subprocess deadlocks#22308

2 hours ago

b749b47

devin/1781629375-fix-fork-stale-loop-refs

0%

fix(services): force-reschedule perpetual services after Redis disruption#22303

4 hours ago

d060032

devin/1781621778-fix-perpetual-service-recovery

© 2026 CodSpeed Technology

Home Terms Privacy Docs