Comment by decasia

Inside my team, we generally review quite promptly (same day, or the next morning). Across teams — it's more variable and depends a lot on context (or lack of context). If I'm chasing down reviews, I'll usually tag people to start out, and then message them directly to ask for reviews 24 hours later, if they don't get back to me sooner. It's rare that someone doesn't review same-day if I ask them directly.

I often find the reviews to be helpful. People come up with edge cases I haven't thought of, or notice things to clean up. I try to proofread everything before asking for reviews, but after I've started at my own diff for a while, it's hard to read it with fresh eyes.

Sometimes we ask for reviews on more experimental PRs too, just to get early design feedback before wasting too much time on polishing the changes.