1brc - 1 Billion Row Challenge

Calculate the min, max, and average of 1 billion measurements

Here is my solution using Rust

How to run

cargo run --release <file_name>

Results

Running in a 1.4G file with 100 million rows

 cargo run --release 1.4G.txt 
    Finished `release` profile [optimized] target(s) in 0.00s
     Running `target/release/a_1brc_rs 1.4G.txt`
Reading file
Processing file
Tokenizing results
Sorting results
Printing results
XXXXXXXX: -xx.x/xx/xx.x
Elapsed: 3 seconds

Finally, the results for 14 gb file with 1 billion rows

 cargo run --release 14G.txt 
    Finished `release` profile [optimized] target(s) in 0.01s
     Running `target/release/a_1brc_rs 14G.txt`
Reading file
Processing file
Tokenizing results
Sorting results
Printing results
XXXXXXXX: -xx.x/xx/xx.x
Elapsed: 41 seconds

Experience

It was fun to implement this solution in Rust. I had to learn a lot about the language and its ecosystem. I had to learn about the std::fs module to read the file, std::collections::HashMap to store the results and many other rust internal features and unstabe features.