os: improve cpus() performance

PR-URL: https://github.com/nodejs/node/pull/11564
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Jackson Tian <shyvo1987@gmail.com>

1 files changed, 17 insertions, 0 deletions

diff --git a/benchmark/os/cpus.js b/benchmark/os/cpus.js
new file mode 100644
index 00000000000..2a8535113c2
--- /dev/null
+++ b/benchmark/os/cpus.js
@@ -0,0 +1,17 @@
+'use strict';
+
+const common = require('../common.js');
+const cpus = require('os').cpus;
+
+const bench = common.createBenchmark(main, {
+  n: [3e4]
+});
+
+function main(conf) {
+  const n = +conf.n;
+
+  bench.start();
+  for (var i = 0; i < n; ++i)
+    cpus();
+  bench.end(n);
+}