--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/third_party/libuv/test/run-benchmarks.c	Wed Jan 14 19:39:52 2026 -0800
@@ -0,0 +1,72 @@
+/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#include <stdio.h>
+#include <string.h>
+
+#include "runner.h"
+#include "task.h"
+
+/* Actual benchmarks and helpers are defined in benchmark-list.h */
+#include "benchmark-list.h"
+
+#ifdef __MVS__
+#include "zos-base.h"
+/* Initialize environment and zoslib */
+__attribute__((constructor)) void init() {
+  zoslib_config_t config;
+  init_zoslib_config(&config);
+  init_zoslib(config);
+}
+#endif
+
+
+static int maybe_run_test(int argc, char **argv);
+
+
+int main(int argc, char **argv) {
+  platform_init(argc, argv);
+
+  switch (argc) {
+  case 1: return run_tests(1);
+  case 2: return maybe_run_test(argc, argv);
+  case 3: return run_test_part(argv[1], argv[2]);
+  default:
+    fprintf(stderr, "Too many arguments.\n");
+    fflush(stderr);
+    return EXIT_FAILURE;
+  }
+}
+
+
+static int maybe_run_test(int argc, char **argv) {
+  if (strcmp(argv[1], "--list") == 0) {
+    print_tests(stdout);
+    return 0;
+  }
+
+  if (strcmp(argv[1], "spawn_helper") == 0) {
+    printf("hello world\n");
+    return 42;
+  }
+
+  return run_test(argv[1], 1, 1);
+}