You can use test-all profiler with the following command:
RUBY_TEST_ALL_PROFILE=true make test-all
This command generates ./test_all_profile and you can analyse
which tests consume memories.
* test/runner.rb: ditto.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@29627 b2dd03c8-39d4-4d8f-98ff-823fe69b080e