benchmark: add `subarray` to `buffer-slice`

PR-URL: https://github.com/nodejs/node/pull/41596
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>

1 files changed, 7 insertions, 3 deletions

diff --git a/benchmark/buffers/buffer-slice.js b/benchmark/buffers/buffer-slice.js
index a64cbd2ab2d..dcb18754e84 100644
--- a/benchmark/buffers/buffer-slice.js
+++ b/benchmark/buffers/buffer-slice.js
@@ -3,7 +3,7 @@ const common = require('../common.js');
 const SlowBuffer = require('buffer').SlowBuffer;
 
 const bench = common.createBenchmark(main, {
-  type: ['fast', 'slow'],
+  type: ['fast', 'slow', 'subarray'],
   n: [1e6]
 });
 
@@ -11,10 +11,14 @@ const buf = Buffer.allocUnsafe(1024);
 const slowBuf = new SlowBuffer(1024);
 
 function main({ n, type }) {
-  const b = type === 'fast' ? buf : slowBuf;
+  const b = type === 'slow' ? slowBuf : buf;
+  const fn = type === 'subarray' ?
+    () => b.subarray(10, 256) :
+    () => b.slice(10, 256);
+
   bench.start();
   for (let i = 0; i < n; i++) {
-    b.slice(10, 256);
+    fn();
   }
   bench.end(n);
 }