https://github.com/whatfor/1bcr.net
https://github.com/whatfor/1bcr.net
Last synced: 5 days ago
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- Host: GitHub
- URL: https://github.com/whatfor/1bcr.net
- Owner: WhatFor
- License: mit
- Created: 2024-05-05T11:47:25.000Z (about 2 years ago)
- Default Branch: main
- Last Pushed: 2024-05-05T11:50:15.000Z (about 2 years ago)
- Last Synced: 2025-10-12T15:14:27.405Z (9 months ago)
- Language: C#
- Size: 10.7 KB
- Stars: 0
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# 1BRC .NET
A fork of https://github.com/myquay/1brc.
### Instructions
The text file contains temperature values for a range of weather stations. Each row is one measurement in the format ;, with the measurement value having exactly one fractional digit. The following shows ten rows as an example:
```
Hamburg;12.0
Bulawayo;8.9
Palembang;38.8
St. John's;15.2
Cracow;12.6
Bridgetown;26.9
Istanbul;6.2
Roseau;34.4
Conakry;31.2
Istanbul;23.0
```
The task is to write a program which reads the file, calculates the min, mean, and max temperature value per weather station, and emits the results on stdout like this (i.e. sorted alphabetically by station name, and the result values per station in the format //, rounded to one fractional digit):
```
{Abha=-23.0/18.0/59.2, Abidjan=-16.2/26.0/67.3, Abéché=-10.0/29.4/69.0, Accra=-10.1/26.4/66.4, Addis Ababa=-23.7/16.0/67.0, Adelaide=-27.8/17.3/58.5, ...}
```
### Running
Run the `CreateMeasurements` cmd tool to generate the 1 billion rows. This is roughly 13GB, so takes some time.