Paving and breakthrough

?????? Refactoring is small, and the result must be a series of small improvements. Sometimes, there will be many small changes, the value of adding to the design is very small, sometimes there will be very little change, but it will make a big difference. This is the breakthrough.
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?????? Too many such experience,? Sometimes because the process of bedding too long and anxious, see here, relieved, really is this!

Paving and breakthrough