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Does substing a directory affects the performance creating/reading/updating many small files in the substed volume? (will use svn there) If yes, how serious is the "penalty"?

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up vote 1 down vote accepted

subst uses native Win32 API DefineDosDevice(), which should not have any noticeable performance penalty.

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I use subst'd drives all the time, including with various version controls and builds and have never seen any degradation; I wouldn't worry about it.

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