I see a change from 2s with a build from a few weeks ago, to 10s with a nightly from a few days ago.
Somebody want to see if codegen for the test changed?
Step 1 would be to narrow the point of regression.
I made some codegen changes recently. They mostly affect code that needs a full scope chain, so it doesn't seem like they are at fault. Regardless, I'll assign this to myself.
I don't see a regression. It is in the same range for all of the nightlies I have on my machine going back to the beginning of June. The only way I can get that kind of a slowdown is if I use a debug build instead of a release build.
Do you remember which nightlies two nightlies demonstrated a regression for you?
This was something random that is no longer a problem.