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Concurrency and asynchronous systems

Threads, async programming, parallelism, race detection, and distributed timing.

4,856 stories · 78 in 30 days · Updated Sep 28, 2026

The pace of conversation

Posts per month

2020-01: 76 posts2020-02: 59 posts2020-03: 79 posts2020-04: 69 posts2020-05: 101 posts2020-06: 73 posts2020-07: 73 posts2020-08: 74 posts2020-09: 53 posts2020-10: 52 posts2020-11: 57 posts2020-12: 45 posts2021-01: 52 posts2021-02: 44 posts2021-03: 55 posts2021-04: 52 posts2021-05: 46 posts2021-06: 58 posts2021-07: 40 posts2021-08: 39 posts2021-09: 35 posts2021-10: 49 posts2021-11: 36 posts2021-12: 42 posts2022-01: 63 posts2022-02: 44 posts2022-03: 61 posts2022-04: 47 posts2022-05: 66 posts2022-06: 53 posts2022-07: 41 posts2022-08: 45 posts2022-09: 52 posts2022-10: 71 posts2022-11: 46 posts2022-12: 39 posts2023-01: 55 posts2023-02: 49 posts2023-03: 73 posts2023-04: 48 posts2023-05: 50 posts2023-06: 71 posts2023-07: 76 posts2023-08: 61 posts2023-09: 64 posts2023-10: 50 posts2023-11: 63 posts2023-12: 60 posts2024-01: 63 posts2024-02: 58 posts2024-03: 58 posts2024-04: 50 posts2024-05: 55 posts2024-06: 63 posts2024-07: 85 posts2024-08: 75 posts2024-09: 69 posts2024-10: 58 posts2024-11: 47 posts2024-12: 51 posts2025-01: 65 posts2025-02: 59 posts2025-03: 64 posts2025-04: 52 posts2025-05: 54 posts2025-06: 52 posts2025-07: 66 posts2025-08: 61 posts2025-09: 60 posts2025-10: 60 posts2025-11: 59 posts2025-12: 64 posts2026-01: 79 posts2026-02: 79 posts2026-03: 73 posts2026-04: 75 posts2026-05: 76 posts2026-06: 76 posts2026-07: 91 posts2026-08: 77 posts2026-09: 75 posts
2020-012026-09

Posts per month · first and latest months may be partial.

01 / EXPLORE THROUGH TIME

Timeline

Start with the latest. Scroll back through time, or zoom in for more.

Year by yearUp to 5 stories per year
2026701 stories
Go Concurrency Distilled↗ antonz.org · HN · 182 comments · 393 points · Sep 26, 2026
A Design Space Exploration of Async/Await↗ cel.cs.brown.edu · HN · 134 comments · 466 points · Sep 09, 2026
Moving beyond fork() + exec()↗ lwn.net · HN · 345 comments · 359 points · Jun 06, 2026
Push events into a running session with channels↗ code.claude.com · HN · 240 comments · 400 points · Mar 20, 2026
Zig – io_uring and Grand Central Dispatch std.Io implementations landed↗ ziglang.org · HN · 305 comments · 369 points · Feb 14, 2026
2025716 stories
Zig's new plan for asynchronous programs↗ lwn.net · HN · 264 comments · 341 points · Dec 02, 2025
We should all be using dependency cooldowns↗ blog.yossarian.net · HN · 272 comments · 489 points · Nov 21, 2025
Structured Procrastination (1995)↗ structuredprocrastination.com · HN · 162 comments · 486 points · Oct 06, 2025
Zig's New Async I/O↗ kristoff.it · HN · 281 comments · 385 points · Jul 12, 2025
Erlang's not about lightweight processes and message passing (2023)↗ stevana.github.io · HN · 197 comments · 331 points · Apr 11, 2025
2024732 stories
We built a self-healing system to survive a concurrency bug at Netflix↗ pushtoprod.substack.com · HN · 165 comments · 345 points · Nov 08, 2024
The Fastest Mutexes↗ justine.lol · HN · 345 comments · 896 points · Oct 02, 2024
Why choose async/await over threads?↗ notgull.net · HN · 458 comments · 430 points · Mar 25, 2024
Show HN: Hatchet – Open-source distributed task queue↗ github.com · HN · 189 comments · 578 points · Mar 08, 2024
Interesting ideas in Observable Framework↗ simonwillison.net · HN · 63 comments · 360 points · Mar 03, 2024
2023720 stories
Towards Oberon+ Concurrency↗ oberon-lang.github.io · HN · 49 comments · 86 points · Dec 25, 2023
Thread-per-core↗ without.boats · HN · 8 comments · 43 points · Oct 06, 2023
Threads Is Now Live↗ techcrunch.com · HN · 5 comments · 24 points · Jul 05, 2023
Threads.net↗ threads.net · HN · 9 comments · 22 points · Jul 04, 2023
WASIX, the Superset of WASI Supporting Threads, Processes and Sockets↗ wasmer.io · HN · 22 comments · 75 points · May 30, 2023
2022628 stories
The hunt for a cluster-killer Erlang bug (2021)↗ engineering.klarna.com · HN · 35 comments · 291 points · Jun 14, 2022
Achieving 5M persistent connections with Project Loom virtual threads↗ github.com · HN · 145 comments · 309 points · Apr 30, 2022
Fork() is evil; vfork() is goodness; afork() would be better; clone() is stupid↗ gist.github.com · HN · 338 comments · 379 points · Feb 28, 2022
OCaml Multicore merged upstream↗ github.com · HN · 74 comments · 320 points · Jan 10, 2022
Procrastinatory Doom Loops↗ brennancolberg.com · HN · 278 comments · 537 points · Jan 06, 2022
2021548 stories
Resource efficient Thread Pools with Zig↗ zig.news · HN · 105 comments · 305 points · Sep 13, 2021
Faster CRDTs: An Adventure in Optimization↗ josephg.com · HN · 151 comments · 686 points · Jul 31, 2021
We found and fixed a rare race condition in our session handling↗ github.blog · HN · 192 comments · 585 points · Mar 18, 2021
Nq – A simple Unix job queue system↗ github.com · HN · 132 comments · 419 points · Jan 26, 2021
Context switching costs more than we give it credit for↗ thinkingthrough.substack.com · HN · 352 comments · 590 points · Jan 18, 2021
2020811 stories
Running Awk in parallel to process 256M records↗ ketancmaheshwari.github.io · HN · 101 comments · 358 points · Jun 02, 2020
Concurrent Programming, with Examples↗ begriffs.com · HN · 88 comments · 330 points · Mar 24, 2020
No nuances, just buggy code (was: related to Spinlock implementation)↗ realworldtech.com · HN · 274 comments · 540 points · Jan 05, 2020
Mutexes are faster than Spinlocks↗ matklad.github.io · HN · 145 comments · 373 points · Jan 04, 2020
I'm not feeling the async pressure↗ lucumr.pocoo.org · HN · 100 comments · 337 points · Jan 01, 2020
Scroll through time ↕

02 / CATCH UP

The conversation now

Popular stories, with attention fading over roughly two weeks.

Go Concurrency Distilled↗ antonz.org · HN · 182 comments · 393 points · Sep 26, 2026
A Design Space Exploration of Async/Await↗ cel.cs.brown.edu · HN · 134 comments · 466 points · Sep 09, 2026
Principles for Fast Tokio Applications↗ dial9-rs.github.io · HN · 66 comments · 249 points · Sep 14, 2026
Deterministic Concurrency [video]↗ youtube.com · HN · 5 comments · 80 points · Sep 26, 2026
Optimizing a Spin-Lock↗ david.alvarezrosa.com · HN · 41 comments · 86 points · Sep 12, 2026

03 / GO DEEPER

Follow your curiosity

Find a particular story, revisit a year, or see what resonated.

Highest rated · the last 30 days

A Design Space Exploration of Async/Await↗ cel.cs.brown.edu · HN · 134 comments · 466 points · Sep 09, 2026
Go Concurrency Distilled↗ antonz.org · HN · 182 comments · 393 points · Sep 26, 2026
Principles for Fast Tokio Applications↗ dial9-rs.github.io · HN · 66 comments · 249 points · Sep 14, 2026
Optimizing a Spin-Lock↗ david.alvarezrosa.com · HN · 41 comments · 86 points · Sep 12, 2026
Is There I/O After Death? What Happens to Io_uring When a Process Dies↗ blog.ydb.tech · HN · 36 comments · 86 points · Sep 02, 2026
Deterministic Concurrency [video]↗ youtube.com · HN · 5 comments · 80 points · Sep 26, 2026
Virtual Threads for a scripting language in Java 8 without Loom↗ jactl.io · HN · 10 comments · 56 points · Sep 01, 2026
Durable execution without history replay↗ trigora.dev · HN · 34 comments · 41 points · Sep 09, 2026
Avoiding the babbling-idiot failure in a time-triggered communication system↗ ieeexplore.ieee.org · HN · 6 comments · 25 points · Sep 21, 2026
Epoll and Kqueue: How Operating Systems Learned to Wait Efficiently↗ thecodinggopher.substack.com · HN · 2 comments · 13 points · Sep 20, 2026

10 stories shown.

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