Hullo

I am writing a tool that checks files for corruption by comparing their calculated checksums vs ones in a manifest text file.

Calculating SHA512 checksums is costly for big files but I was surprised to see Ruby outperforming Crystal.

These are the files I'm using for Benchmarking - and I'd like other people to confirm my results.

Get up and running

1. Clone this respository
2. Ensure you have ruby 2.3.0 installed. Use RVM my friend.
3. Install the crystal-lang compiler on your machine.

Running Benchmarks

Unzip the contents of this file into the cloned directory (~5GB zipped / ~10GB unzipped). They are the files used whose checksums are calculated as a test bench.

Running The Crystal App

1. Build the crystal executable crystal build --release shootout.cr
2. Run it (time ./shootout)

Running The Ruby Script

time ruby shootout.rb

Exemplary Results From My Machine

$ crystal build --release shootout.cr
$ time ./shootout
Awesome!: video_3.mov
Awesome!: picard.jpeg
Awesome!: lorem_1.txt
Awesome!: video_1.mov
Awesome!: urand.data
Awesome!: video_2.mov

real    0m42.383s
user    0m37.452s
sys 0m4.074s

$ time ruby shootout.rb
Awesome!: video_3.mov
Awesome!: picard.jpeg
Awesome!: lorem_1.txt
Awesome!: video_1.mov
Awesome!: urand.data
Awesome!: video_2.mov

real    0m25.769s
user    0m21.017s
sys 0m3.911s

What's the performance like on your machine?

Add it as an issue in the git repo. Please try to include:

1. OS Version
2. RAM and processor information