diff --git a/hosts/ocaml/bin/sx_server.ml b/hosts/ocaml/bin/sx_server.ml
index 258dedde..55b3db91 100644
--- a/hosts/ocaml/bin/sx_server.ml
+++ b/hosts/ocaml/bin/sx_server.ml
@@ -825,8 +825,9 @@ let register_jit_hook env =
            let compiled = Sx_vm.jit_compile_lambda l (env_to_vm_globals env) in
            let dt = Unix.gettimeofday () -. t0 in
            _jit_compiling := false;
-           Printf.eprintf "[jit] %s compile %s in %.3fs\n%!"
-             fn_name (match compiled with Some _ -> "OK" | None -> "FAIL") dt;
+           if dt > 0.5 || (match compiled with None -> true | _ -> false) then
+             Printf.eprintf "[jit] %s compile %s in %.3fs\n%!"
+               fn_name (match compiled with Some _ -> "OK" | None -> "FAIL") dt;
            match compiled with
            | Some cl ->
              l.l_compiled <- Some cl;