Instructions for use:

1. Run bundle install
2. In each folder ar/ and sq/:
   1. Select which database you want to use in db.rb and db.rb.
   2. Run database migration in using ruby migrations.rb.
   3. Seed the database using ruby seed.rb.
   4. Run benchmark script ruby bench.rb.
3. Speed performance results are logged to results.txt.
4. Memory usage are logged to various *.txt files (see bench.rb for filenames).