My point is I've run really big builds (i.e. taking about an hour to build non-sanitized) & we still did sanitized builds pre-submit. How big is the disparity you're seeing between sanitized & non-sanitized builds?

An hour, ouch. That's pretty long. We try to keep our presubmit under 10 minutes, and that's already frustrating.

I can't figure out how to dig the numbers out of our CI infrastructure for the nightly sanitizer runs.

I guess my point was more that it depends on how you structure your workflow. As long as you can do reviews and kick off asynchronous merge requests, the actual time it takes starts to be come largely irrelevant in my experience (aside from the impact it has on local iteration).

These days I'm on a different project and CI ASAN builds are 33 minutes vs normal builds of 21 minutes. I'd say that extra 10 minutes is fine because sanitized builds run in parallel to normal builds & this is clean builds vs incremental.