Add benchmark script

Author: keichi

benchmark/bench.js

@@ -0,0 +1,82 @@
+var binary = require('binary');
+var Benchmark = require('benchmark');
+var bp = require('binparse').bp;
+var Parser = require('binary-parser').Parser;
+var Destruct = require('destruct-js');
+const Struct = require('structron');
+
+var suite = new Benchmark.Suite;
+
+// binparse
+const PointParser = bp.object('Point', {
+    x: bp.lu16,
+    y: bp.lu16,
+    z: bp.lu16,
+});
+
+const PointsParser = bp.object('SimpleObject', {
+    length: bp.variable('len', bp.lu32),
+    points: bp.array('Points', PointParser, 'len'),
+});
+
+// binary-parser
+const Points = new Parser()
+    .uint32le('len')
+    .array('points', {
+        length: 'len',
+        type: new Parser()
+            .uint16le('x')
+            .uint16le('y')
+            .uint16le('z')
+    });
+
+// destruct-js
+const spec = new Destruct.Spec({mode: Destruct.Mode.LE});
+spec.field('len', Destruct.UInt32)
+    .loop('points', (r) => r.len, new Destruct.Spec({mode: Destruct.Mode.LE})
+            .field('x', Destruct.UInt16)
+            .field('y', Destruct.UInt16)
+            .field('z', Destruct.UInt16));
+
+// structron
+const PointsStruct = new Struct()
+  .addMember(Struct.TYPES.UINT_LE, 'len')
+  .addArray(
+      new Struct().addMember(Struct.TYPES.USHORT_LE, 'x')
+                  .addMember(Struct.TYPES.USHORT_LE, 'y')
+                  .addMember(Struct.TYPES.USHORT_LE, 'z'),
+      'points', 0, 'len'
+  );
+
+// Prepare input
+var n = 1000;
+var buf = Buffer.alloc(4 + n * 2 * 3);
+
+buf.writeUInt32LE(n, 0);
+for (var i = 0; i < n; i++) {
+    buf.writeUInt16LE(123, i * 6 + 0 + 4);
+    buf.writeUInt16LE(456, i * 6 + 2 + 4);
+    buf.writeUInt16LE(789, i * 6 + 4 + 4);
+}
+
+// Run benchmarks
+suite
+.add('binparse', function() {
+   const points = PointsParser.read(buf);
+})
+.add('binary-parser', function() {
+   const points = Points.parse(buf);
+})
+.add('destruct-js', function() {
+   const points = spec.read(buf);
+})
+.add('structron', function() {
+   const points = PointsStruct.read(buf);
+})
+.on('cycle', function(event) {
+    console.log(String(event.target));
+})
+.on('complete', function() {
+    console.log('Fastest is ' + this.filter('fastest').map('name'));
+})
+.run({ 'async': true });

benchmark/package.json

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+{
+  "dependencies": {
+    "benchmark": "^2.1.4",
+    "binary": "0.3.0",
+    "binary-parser": "1.8.0",
+    "binparse": "1.1.0",
+    "destruct-js": "^0.2.9",
+    "structron": "^0.4.2"
+  }
+}