LAlatchkey·Jun 17, 2025
I've been using this one for years, can you do comparisons against it?
https://github.com/cornelk/hashmap
In Cmapv2: A high performance, concurrent mapcornelk
hashmap
Go2018–2025
cornelk / hashmap
hashmap
A Golang lock-free thread-safe HashMap optimized for fastest read access.
4Distinct people
9Mentions
0Explicit recommenders
1.9KGitHub stars
What to know before exploring
What it is
A Golang lock-free thread-safe HashMap optimized for fastest read access.
GitHub
Where it is used
No documented product use has been verified yet.
What people are saying
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This week on Hacker News
Nov 7–Nov 14 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/14/2026, 1:49:46 PM UTC.
No direct repository links were found in the indexed HN discussions over the past seven days. Older discussions are available below.
Mentions over time
HN mentions by year9 dated mentions
Observed mentions: 2018-06-20 06:59:01 UTC to 2025-06-17 16:55:36 UTC.
Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.
View mention counts and date ranges
| Period | Start (UTC) | End (exclusive, UTC) | Mentions | Submissions | Comments |
|---|---|---|---|---|---|
| 2018 | 2018-01-01 00:00:00 UTC | 2019-01-01 00:00:00 UTC | 2 | 1 | 1 |
| 2019 | 2019-01-01 00:00:00 UTC | 2020-01-01 00:00:00 UTC | 1 | 0 | 1 |
| 2020 | 2020-01-01 00:00:00 UTC | 2021-01-01 00:00:00 UTC | 0 | 0 | 0 |
| 2021 | 2021-01-01 00:00:00 UTC | 2022-01-01 00:00:00 UTC | 0 | 0 | 0 |
| 2022 | 2022-01-01 00:00:00 UTC | 2023-01-01 00:00:00 UTC | 2 | 0 | 2 |
| 2023 | 2023-01-01 00:00:00 UTC | 2024-01-01 00:00:00 UTC | 3 | 0 | 3 |
| 2024 | 2024-01-01 00:00:00 UTC | 2025-01-01 00:00:00 UTC | 0 | 0 | 0 |
| 2025 | 2025-01-01 00:00:00 UTC | 2026-01-01 00:00:00 UTC | 1 | 0 | 1 |
What Hacker News says
9 sourcesI see you have a map implementation, how does that compare with this one?
github.com/cornelk/hashmap
In A Golang generics library without reflect and third-party packagesI generally just use this one: https://github.com/cornelk/hashmap
Mostly in that it also gives me lock free performance, which cleans up a lot of defers.
In SwissMap: A smaller, faster Golang Hash TableGlad to see this make it into the core.
I've been using this library for ages now...
https://github.com/cornelk/hashmap
Always entertains me to see developers write all the lock/unlock code when they could just use that.
In Go 1.20 releasedBest 3rd party Map library that I've found. https://github.com/cornelk/hashmap
In Gojq: Pure Go Implementation of JqAgree, but I can't recall ever seeing a package in the wild that labels itself as "concurrency-safe" and yet requires the caller to explicitly call Lock!
HashMap is probably a good example
https://github.com/cornelk/hashmap
In Uber Go Style GuideThere's some context missing here. AFAIK the author of the repositories was specifically doing micro-benchmarks here to inform the design of his https://github.com/cornelk/hashmap library. I think for that use case (designing a high-performance lock-free data structure), that kind of micro-benchmarking makes a lot of sense.
That hash map looks good and I'm thinking we'd probably benefit from using it on the hot path of some code we have that needs to be highly scalable.
(Both links were submitted to HN, but only this one seems to have landed on the front page.)
In Go-benchmark: Golang benchmarks used for optimizing codeCornelk/hashmap: A Golang lock-free thread-safe HashMap optimized for reading
3 points · Open discussion