Minitest Hog
Prints a list of tests that take too long.
Installation
gem install minitest-hog
Usage
Minitest Hog can be enabled from the command line using the max-memory parameter:
ruby test/example_test.rb --max-memory 16
This would print out a list of any tests that use more than 16k of memory:
# Running:
....
Finished in 1.001143s
4 runs, 7 assertions, 0 failures, 0 errors, 0 skips
2 slow tests.
0) ExampleTest#test_alpha: 31 kb
1) ExampleTest#test_beta: 18 kb
Usage with Rake
If you run your tests with Rake, set the TESTOPTS environment variable:
rake TESTOPTS="--max-memory 16"
Warning!
There are many ways to measure memory usage in Ruby. The results from Minitest Hog may not be exact, but should accurately reflect proportional memory usage.