perf_hooks: add toJSON to performance class

Added toJSON method to the InternalPerformance class as per the
convention followed in other performance classes and per the spec:
https://www.w3.org/TR/hr-time/#tojson-method

Fixes: https://github.com/nodejs/node/issues/37623

PR-URL: https://github.com/nodejs/node/pull/37771
Fixes: https://github.com/nodejs/node/issues/37623
Reviewed-By: James M Snell <jasnell@gmail.com>

1 files changed, 14 insertions, 0 deletions

diff --git a/test/parallel/test-tojson-perf_hooks.js b/test/parallel/test-tojson-perf_hooks.js
new file mode 100644
index 00000000000..2a716fc4478
--- /dev/null
+++ b/test/parallel/test-tojson-perf_hooks.js
@@ -0,0 +1,14 @@
+'use strict';
+
+require('../common');
+const assert = require('assert');
+const { performance } = require('perf_hooks');
+
+// Test toJSON for performance object
+{
+  assert.strictEqual(typeof performance.toJSON, 'function');
+  const jsonObject = performance.toJSON();
+  assert.strictEqual(typeof jsonObject, 'object');
+  assert.strictEqual(jsonObject.timeOrigin, performance.timeOrigin);
+  assert.strictEqual(typeof jsonObject.nodeTiming, 'object');
+}