I'm interested in quantitative evidence of "faster". I have 1.5GB of mail in gmail that I sync to fastmail and gmail is significantly, noticeably faster for me

I'm interested in quantitative evidence of "faster". I have 1.5GB of mail in gmail that I sync to fastmail and gmail is significantly, noticeably faster for me. Especially search. I am skeptical of performance claims especially by people (not referring to you, but to the author of the post) who think mail.app is fast. Mail.app needs several seconds to do things that gmail does in 50 milliseconds, like load a thread with 100 posts, or free text search.