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Untangling Tokio and Rayon in production: From 2s latency spikes to 94ms flat

PostHog Blog · published 8 April 2026

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2blogs citing

First cited: 21 Apr 2026
Most recent: 21 Apr 2026
Rank this month: not ranked
Links from this post: 10
Words captured: 2,243

Cited by

Blog

In the post

Date

The Tokio/Rayon Trap and Why Async/Await Fails Concurrency Read at the source ↗

21 Apr 2026

newsletter.posthog.com

Great companies are built in hackathons Read at the source ↗

21 Apr 2026

Links from this post

Link

Host

https://docs.rs/tokio/latest/tokio/

docs.rs

https://docs.rs/rayon/latest/rayon/

docs.rs

Async: What is blocking? Read at the source ↗

https://en.wikipedia.org/wiki/Topological_sorting

en.wikipedia.org

Mixing rayon and tokio for fun and (hair) loss Read at the source ↗

blog.dureuill.net

https://engineering.omio.com/cpu-limits-and-aggressive-throttling-in-kubernetes-c5b20bd8a718

engineering.omio.com

Reducing tail latencies with automatic cooperative task yielding Read at the source ↗

https://www.influxdata.com/blog/using-rustlangs-async-tokio-runtime-for-cpu-bound-tasks/

influxdata.com

https://github.com/PostHog/posthog/pull/47457

github.com

https://github.com/PostHog/posthog/pull/50430

github.com