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Rule and value range clarifications

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Gunnar Morling 2024-01-04 12:19:31 +01:00 committed by GitHub
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# 1️⃣🐝🏎️ The One Billion Row Challenge # 1️⃣🐝🏎️ The One Billion Row Challenge
_Status Jan 1: This challenge is open for submissions!_ _Status Jan 1: This challenge is [open for submissions](https://www.morling.dev/blog/one-billion-row-challenge/)!_
The One Billion Row Challenge (1BRC) is a fun exploration of how far modern Java can be pushed for aggregating one billion rows from a text file. The One Billion Row Challenge (1BRC) is a fun exploration of how far modern Java can be pushed for aggregating one billion rows from a text file.
Grab all your (virtual) threads, reach out to SIMD, optimize your GC, or pull any other trick, and create the fastest implementation for solving this task! Grab all your (virtual) threads, reach out to SIMD, optimize your GC, or pull any other trick, and create the fastest implementation for solving this task!
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* Implementations must be provided as a single source file * Implementations must be provided as a single source file
* The computation must happen at application _runtime_, i.e. you cannot process the measurements file at _build time_ * The computation must happen at application _runtime_, i.e. you cannot process the measurements file at _build time_
(for instance, when using GraalVM) and just bake the result into the binary (for instance, when using GraalVM) and just bake the result into the binary
* Input value ranges are as follows:
* Station name: non null UTF-8 string of min length 1 character and max length 100 characters
* Temperature value: non null double between -99.9 (inclusive) and 99.9 (inclusive), always with one fractional digit
* Implementations must not rely on specifics of a given data set, e.g. any valid station name as per the constraints above and any data distribution (number of measurements per station) must be supported
## Entering the Challenge ## Entering the Challenge