buffer: use slightly faster NaN check

PR-URL: https://github.com/nodejs/node/pull/12286
Reviewed-By: Timothy Gu <timothygu99@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>

1 files changed, 23 insertions, 0 deletions

diff --git a/benchmark/buffers/buffer-indexof-number.js b/benchmark/buffers/buffer-indexof-number.js
new file mode 100644
index 0000000000..2e6e10b9f3
--- /dev/null
+++ b/benchmark/buffers/buffer-indexof-number.js
@@ -0,0 +1,23 @@
+'use strict';
+const common = require('../common.js');
+const fs = require('fs');
+const path = require('path');
+
+const bench = common.createBenchmark(main, {
+  value: ['@'.charCodeAt(0)],
+  n: [1e7]
+});
+
+function main(conf) {
+  const n = +conf.n;
+  const search = +conf.value;
+  const aliceBuffer = fs.readFileSync(
+    path.resolve(__dirname, '../fixtures/alice.html')
+  );
+
+  bench.start();
+  for (var i = 0; i < n; i++) {
+    aliceBuffer.indexOf(search, 0, undefined);
+  }
+  bench.end(n);
+}