Its search is excellent, but the load time of the program itself, of emails, is very slow for me, on both Windows and Linux. Then the rendering! As I scroll an

Its search is excellent, but the load time of the program itself, of emails, is very slow for me, on both Windows and Linux. Then the rendering! As I scroll an email it struggles to render the content and lags behind. Same problems on release, beta, and nightly. Hmm.