diff --git a/src/flag-definitions.h b/src/flag-definitions.h
index 4c5a56ebaf..c50b0fba94 100644
--- a/src/flag-definitions.h
+++ b/src/flag-definitions.h
@@ -290,10 +290,10 @@ DEFINE_bool(opt_safe_uint32_operations, true,
             "allow uint32 values on optimize frames if they are used only in "
             "safe operations")
 
-DEFINE_bool(parallel_recompilation, false,
+DEFINE_bool(parallel_recompilation, true,
             "optimizing hot functions asynchronously on a separate thread")
 DEFINE_bool(trace_parallel_recompilation, false, "track parallel recompilation")
-DEFINE_int(parallel_recompilation_queue_length, 3,
+DEFINE_int(parallel_recompilation_queue_length, 8,
            "the length of the parallel compilation queue")
 DEFINE_int(parallel_recompilation_delay, 0,
            "artificial compilation delay in ms")