Added benchmark vs bitcoinjs fastRoot

bench.js

@@ -0,0 +1,50 @@
+'use strict'
+const crypto = require('crypto')
+
+const randomByte = () => Math.trunc(Math.random() * 256)
+const leaves = []
+for (let i = 0; i < 1000000; i++) {
+  const randomLeaf = Buffer.alloc(32)
+  for (let i = 0; i < 32; i++) randomLeaf[i] = randomByte()
+  leaves.push(randomLeaf)
+}
+
+// From bitcoinjs merkle-lib
+function fastRoot (values, digestFn) {
+  if (!Array.isArray(values)) throw TypeError('Expected values Array')
+  if (typeof digestFn !== 'function') throw TypeError('Expected digest Function')
+
+  var length = values.length
+  var results = values.concat()
+
+  while (length > 1) {
+    var j = 0
+
+    for (var i = 0; i < length; i += 2, ++j) {
+      var left = results[i]
+      var right = i + 1 === length ? left : results[i + 1]
+      var data = Buffer.concat([left, right])
+
+      results[j] = digestFn(data)
+    }
+
+    length = j
+  }
+
+  return results[0]
+}
+
+one: {
+  const digestFn = buf => crypto.createHash('sha256').update(buf).digest()
+  console.time('fastRoot')
+  const root = fastRoot(leaves, digestFn)
+  console.timeLog('fastRoot', root.toString('hex'))
+}
+
+const mroot = require('./mroot.js')
+two: {
+  const hasher = (a, b) => crypto.createHash('sha256').update(Buffer.concat([a, b])).digest()
+  console.time('mroot   ')
+  const root = mroot(leaves, hasher, true)
+  console.timeLog('mroot   ', root.toString('hex'))
+}

package.json

@@ -1,6 +1,6 @@
 {
   "name": "mroot",
-  "version": "2.1.0",
+  "version": "2.1.1",
   "description": "Simple Merkle root calculator",
   "main": "mroot",
   "scripts": {