20:20:50nyef... Okay, having checked logs, the main build-time feature toggles that affect time-cost of code running on the target system are threads and unicode.
20:21:51nyefEverything beyond that is... Oh, wait. The one who originally asked already left. Nevermind.
21:18:33|3b|stassats, scymtym: sb-concurrency tests hang once in a while for me on x8664 windows