Is this _still_ a concern? #2016
Randy MacDonald

It certainly is a concern in a large test suite — and we’re not really talking about just cpu cycles. We’re talking network lag & disk I/O for db setup / teardown, etc… That adds up quickly when you have tens of thousands of tests, and it can turn a test suite that could run in 3 minutes into a test suite that takes 3 hours to run — and that makes a huge difference in developer productivity.

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