Performance Issues/Request

Hello, first thanks for making this, it's an invaluable tool. I just have a couple questions/issues about helping performance.

1. Would it be possible to have the software not calculate the changes to a method if the method is not checked as active? I often have very large data sets that I need to rename and the software hangs for every character that I type into the parameters for a method. It would be nice to uncheck the method, make the changes and then re-check it to let it crunch all the changes at once.

2. In the same vein as above, it would be nice to have an option to not analyze the files. This would be helpful for large data sets you want to do a basic rename for and not do anything that would require metadata that would be analyzed.

Thanks for your time!

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