[aiharkness]

Clearing pushed content in the browser options has nothing to do with pushed email.

Clearing browser cache, cookies, etc. is a good troubleshooting step when you are having issues with the browser. Me personally, I don't do it as a preventative, but only when there seems to be a problem; and I try to avoid clearing cookies as login info is typically stored in cookies and I'm too lazy to want to have to enter login info again.

Memory cleaning, if you are talking about security options, is not what you think it is. When enabled, it overwrites unused memory locations for security. It doesn't free up memory.

I agree with leaving browser push enabled. I don't know of any practical negatives to leaving it enabled. Your observation of slow response when sending messages after you disabled browser push is coincidence.
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