In order to lean Odin, I decided to implement a solution to the 1brc.

1. Generate a measurements.txt file by cloning the challenge repository and following the instructions.
2. Build odin build . -o:speed
3. Run: ./1brc-odin <path-to-measurements.txt> <thread-count>. Thread count defaults to your number of logical CPUs if not provided.

The results are written to results.txt.

By default the build is configured to use a memory mapped file to read in data, but the program only has support for memory mapped files on MacOS and Linux. If running on Windows or something else, you can disable this using odin build . -o:speed -define:USE_MMAP=false.

On an M4 Macbook Pro with 14 cores (10/4):

> ./1brc-odin ../1brc/measurements_1b.txt
1BR Challenge
USE_MMAP: true
Job Count: 14
File size 13795416316
Finished in 2.97698175s