Check pre-selfprofile if self.prof.enabled() is true

Author: blyxyas

compiler/rustc_session/src/utils.rs

@@ -9,7 +9,11 @@ impl Session {
     }
     /// Used by `-Z self-profile`.
     pub fn time<R>(&self, what: &'static str, f: impl FnOnce() -> R) -> R {
-        self.prof.verbose_generic_activity(what).run(f)
+        if self.prof.enabled() {
+            return self.prof.verbose_generic_activity(what).run(f)
+        } else {
+            return f()
+        }
     }
 }