buffer: optimize hex_decode

PR-URL: https://github.com/nodejs/node/pull/7602
Reviewed-By: Anna Henningsen <anna@addaleax.net>

1 files changed, 26 insertions, 0 deletions

diff --git a/benchmark/buffers/buffer-hex.js b/benchmark/buffers/buffer-hex.js
new file mode 100644
index 0000000000..d05bb832b3
--- /dev/null
+++ b/benchmark/buffers/buffer-hex.js
@@ -0,0 +1,26 @@
+'use strict';
+
+const common = require('../common.js');
+
+const bench = common.createBenchmark(main, {
+  len: [0, 1, 64, 1024],
+  n: [1e7]
+});
+
+function main(conf) {
+  const len = conf.len | 0;
+  const n = conf.n | 0;
+  const buf = Buffer.alloc(len);
+
+  for (let i = 0; i < buf.length; i++)
+    buf[i] = i & 0xff;
+
+  const hex = buf.toString('hex');
+
+  bench.start();
+
+  for (let i = 0; i < n; i += 1)
+    Buffer.from(hex, 'hex');
+
+  bench.end(n);
+}