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buybackoff
1brc
C#2024–2024
buybackoff / 1brc

1brc

1BRC in .NET among fastest on Linux

Systems & Infrastructure
Explore on GitHubRead Hacker News discussions
3Distinct people
3Mentions
0Explicit recommenders
451GitHub stars
REPOSITORY AT A GLANCE

What to know before exploring

What it is

1BRC in .NET among fastest on Linux

GitHub

Where it is used

No documented product use has been verified yet.

What people are saying

No recommendation phrase was found in the indexed comments.

No classified warning is attached to this page. Read the discussions before treating silence as approval.

Also in these discussions

No other repository is repeatedly linked in the same discussions.

This week on Hacker News

Nov 7–Nov 14 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/14/2026, 3:56:07 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 3-hour interval3 dated mentions

Observed mentions: 2024-01-04 10:01:27 UTC to 2024-01-07 16:55:32 UTC.

0122024-01-04 09:00:00 UTC to 2024-01-04 12:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 commentsJan 4, 09:002024-01-04 12:00:00 UTC to 2024-01-04 15:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2024-01-04 15:00:00 UTC to 2024-01-04 18:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2024-01-04 18:00:00 UTC to 2024-01-04 21:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2024-01-04 21:00:00 UTC to 2024-01-05 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2024-01-05 00:00:00 UTC to 2024-01-05 03:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2024-01-05 03:00:00 UTC to 2024-01-05 06:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2024-01-05 06:00:00 UTC to 2024-01-05 09:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2024-01-05 09:00:00 UTC to 2024-01-05 12:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2024-01-05 12:00:00 UTC to 2024-01-05 15:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2024-01-05 15:00:00 UTC to 2024-01-05 18:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2024-01-05 18:00:00 UTC to 2024-01-05 21:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2024-01-05 21:00:00 UTC to 2024-01-06 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2024-01-06 00:00:00 UTC to 2024-01-06 03:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 commentsJan 6, 00:002024-01-06 03:00:00 UTC to 2024-01-06 06:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2024-01-06 06:00:00 UTC to 2024-01-06 09:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2024-01-06 09:00:00 UTC to 2024-01-06 12:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2024-01-06 12:00:00 UTC to 2024-01-06 15:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2024-01-06 15:00:00 UTC to 2024-01-06 18:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2024-01-06 18:00:00 UTC to 2024-01-06 21:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2024-01-06 21:00:00 UTC to 2024-01-07 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2024-01-07 00:00:00 UTC to 2024-01-07 03:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2024-01-07 03:00:00 UTC to 2024-01-07 06:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2024-01-07 06:00:00 UTC to 2024-01-07 09:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2024-01-07 09:00:00 UTC to 2024-01-07 12:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2024-01-07 12:00:00 UTC to 2024-01-07 15:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2024-01-07 15:00:00 UTC to 2024-01-07 18:00:00 UTC (exclusive): 2 mentions; 0 submissions, 2 commentsJan 7, 15:00

Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.

View mention counts and date ranges
UTC ranges include their start and exclude their end. Select a period to filter the source evidence.
PeriodStart (UTC)End (exclusive, UTC)MentionsSubmissionsComments
Jan 4, 09:002024-01-04 09:00:00 UTC2024-01-04 12:00:00 UTC101
Jan 4, 12:002024-01-04 12:00:00 UTC2024-01-04 15:00:00 UTC000
Jan 4, 15:002024-01-04 15:00:00 UTC2024-01-04 18:00:00 UTC000
Jan 4, 18:002024-01-04 18:00:00 UTC2024-01-04 21:00:00 UTC000
Jan 4, 21:002024-01-04 21:00:00 UTC2024-01-05 00:00:00 UTC000
Jan 5, 00:002024-01-05 00:00:00 UTC2024-01-05 03:00:00 UTC000
Jan 5, 03:002024-01-05 03:00:00 UTC2024-01-05 06:00:00 UTC000
Jan 5, 06:002024-01-05 06:00:00 UTC2024-01-05 09:00:00 UTC000
Jan 5, 09:002024-01-05 09:00:00 UTC2024-01-05 12:00:00 UTC000
Jan 5, 12:002024-01-05 12:00:00 UTC2024-01-05 15:00:00 UTC000
Jan 5, 15:002024-01-05 15:00:00 UTC2024-01-05 18:00:00 UTC000
Jan 5, 18:002024-01-05 18:00:00 UTC2024-01-05 21:00:00 UTC000
Jan 5, 21:002024-01-05 21:00:00 UTC2024-01-06 00:00:00 UTC000
Jan 6, 00:002024-01-06 00:00:00 UTC2024-01-06 03:00:00 UTC000
Jan 6, 03:002024-01-06 03:00:00 UTC2024-01-06 06:00:00 UTC000
Jan 6, 06:002024-01-06 06:00:00 UTC2024-01-06 09:00:00 UTC000
Jan 6, 09:002024-01-06 09:00:00 UTC2024-01-06 12:00:00 UTC000
Jan 6, 12:002024-01-06 12:00:00 UTC2024-01-06 15:00:00 UTC000
Jan 6, 15:002024-01-06 15:00:00 UTC2024-01-06 18:00:00 UTC000
Jan 6, 18:002024-01-06 18:00:00 UTC2024-01-06 21:00:00 UTC000
Jan 6, 21:002024-01-06 21:00:00 UTC2024-01-07 00:00:00 UTC000
Jan 7, 00:002024-01-07 00:00:00 UTC2024-01-07 03:00:00 UTC000
Jan 7, 03:002024-01-07 03:00:00 UTC2024-01-07 06:00:00 UTC000
Jan 7, 06:002024-01-07 06:00:00 UTC2024-01-07 09:00:00 UTC000
Jan 7, 09:002024-01-07 09:00:00 UTC2024-01-07 12:00:00 UTC000
Jan 7, 12:002024-01-07 12:00:00 UTC2024-01-07 15:00:00 UTC000
Jan 7, 15:002024-01-07 15:00:00 UTC2024-01-07 18:00:00 UTC202

What Hacker News says

3 sources
eyegor·Jan 7, 2024
It's wild to me that they would write performance focused code (unsafe ptrs, memory mapped files, etc) and then still use linq in the main work loop [0]. This implementation could go much much faster. Of course rewriting the parallelism and aggregation from linq is a decent amount of effort, but I'm betting that applying the lazy man's hack [1] would have decent gains. [0] https://github.com/buybackoff/1brc/blob/main/1brc/App.cs#L12... [1] https://github.com/reegeek/StructLinq
In The One Billion Row Challenge – .NET Edition

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