gunnarmorling/1brc resource
1️⃣🐝🏎️ The One Billion Row Challenge -- A fun exploration of how quickly 1B rows from a text file can be aggregated with Java observed · 2026-08-28
Health v2 · maintenance only
26/100
- Activity 0
- Release rhythm 35
- Longevity 69
Flags: no_releases
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-02. Adoption (stars, forks) is never an input.
- gap_med: n/a
- age_days: 979
- days_rel: n/a
- days_push: 743
- n_releases_24m: 0
Adoption not part of the score
8110 stars · 2244 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded
The One Billion Row Challenge (1BRC) is a community coding challenge exploring how fast a Java program can aggregate min/mean/max temperature values from one billion rows of a text file. The repository hosts the challenge rules, baseline implementation, data generator, and leaderboard of optimized submissions.
Use cases
- learn high-performance Java optimization techniques
- benchmark JVM performance with large file aggregation
- study SIMD, threading, and GC tuning in Java
- run a coding challenge for a team or community
- compare performance of different aggregation approaches
When to choose
- you want to learn or teach extreme Java performance optimization
- you need a realistic large-scale data processing benchmark exercise
- you want to explore modern JVM features like virtual threads and SIMD intrinsics
When to avoid
- you need a production data aggregation tool
- you want a maintained library with an API
- you work outside the JVM and need a ready-made solution
Facets
learning-resource · maturity maintenance
benchmarking data-science developer-tools performance developer-tools jvm cross-platform java performance-optimization coding-challenge simd data-aggregation 1brc algorithms linux
3 sources
- readme: https://github.com/gunnarmorling/1brc · fetched 2026-08-28 · 9e1b46711190
- homepage: https://www.morling.dev/blog/one-billion-row-challenge/ · fetched 2026-08-29 · 6decd9c86d78
- site_page: https://www.morling.dev/about · fetched 2026-08-29 · 0a90ec391c5b
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| gunnarmorling/1brc | main | 26 |
For agents
markdown · JSON · MCP: product_card(name="gunnarmorling/1brc")
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem