diff --git a/compiler-rt/lib/scudo/standalone/tsd.h b/compiler-rt/lib/scudo/standalone/tsd.h
--- a/compiler-rt/lib/scudo/standalone/tsd.h
+++ b/compiler-rt/lib/scudo/standalone/tsd.h
@@ -41,9 +41,9 @@
       return true;
     }
     if (atomic_load_relaxed(&Precedence) == 0)
-      atomic_store_relaxed(
-          &Precedence,
-          static_cast<uptr>(getMonotonicTime() >> FIRST_32_SECOND_64(16, 0)));
+      atomic_store_relaxed(&Precedence,
+                           static_cast<uptr>(getMonotonicTimeFast() >>
+                                             FIRST_32_SECOND_64(16, 0)));
     return false;
   }
   inline void lock() NO_THREAD_SAFETY_ANALYSIS {