A simple benchmark of some strategies to do Matrix multiplication (dot product) in Ruby.
See post at: http://abinoam.tl1n.com/400x-faster-matrix-multiplication-for-ruby/
Basically it shows that using NMatrix#dot with an NMatrix object with dtype: :float64 is more than 400x faster than using Matrix#*.
$ git clone git@github.com:abinoam/matrix_dot_bench.git
$ cd matrix_dot_bench
$ bundle install
$ exe/matrix_dot_bench
After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.
To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.
Bug reports and pull requests are welcome on GitHub at https://github.com/abinoam/matrix_dot_bench.
The gem is available as open source under the terms of the MIT License.