1 files changed, 22 insertions, 0 deletions
diff --git a/testing/web-platform/tests/workers/support/WorkerSendingPerformanceNow.js b/testing/web-platform/tests/workers/support/WorkerSendingPerformanceNow.js
new file mode 100644
index 0000000000..ac12190efe
--- /dev/null
+++ b/testing/web-platform/tests/workers/support/WorkerSendingPerformanceNow.js
@@ -0,0 +1,22 @@
+function calcResponse() {
+  const response = [
+    typeof(workerStart),
+    typeof(performance),
+    typeof(performance.now),
+    performance.now()
+  ];
+  return response;
+}
+
+self.onmessage = function(event) {
+  postMessage(calcResponse());
+  self.close();
+}
+
+self.addEventListener("connect", function(event) {
+  const port = event.ports[0];
+  port.onmessage = function(event) {
+    port.postMessage(calcResponse());
+    port.close();
+  };
+});