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To have a better vision of what objects are created in our spec file we can use test-prof, a powerful gem that provides a collection of different tools to analyse your test suite performance. One of this tool is really useful to identify a factory cascade, let’s introduce factory profiler.
The factory-bot gem is used in almost in all of our spec files and it make our set up much more easier than when we use fixtures. Here is the tradeoff, the easier the gem is to use, the more likely you’ll end up with some pain to control its usage. And when the times come to tackle slow tests, the best bet you can take is to start digging into you factories because it’s likely they are the primary reason why your test suite is slowing down