Many people have asserted this, but it&#x27;s not true.  As long as ReSharper is active it does have a performance impact.  The impact varies depending on the current action, and yes opening a new project does have the largest impact.<p>Honestly, I&#x27;m done giving ReSharper chances.  Of all the times I&#x27;ve tried it, I&#x27;ve yet to encounter any feature that justifies the wet blanket thrown over the IDE.  I&#x27;ve tried on large projects and small projects, across multiple computers.  I&#x27;ve followed JetBrains&#x27; recommendations for improving performance.  The performance impact is noticeable, and the UX drives me nuts.<p>Like I said, I like some other products from JetBrains, but ReSharper just isn&#x27;t for me.  If it works for you, and the impact is negligible enough to not matter, thats great.