bench: Buffer read/write benchmarks

addaleax · Feb 19, 2013 · 55aa257 · 55aa257
1 parent 419607e
commit 55aa257
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Showing 4 changed files with 91 additions and 200 deletions.
diff --git a/benchmark/buffer_read.js b/benchmark/buffer_read.js
diff --git a/benchmark/buffer_write.js b/benchmark/buffer_write.js
diff --git a/benchmark/buffers/buffer_read.js b/benchmark/buffers/buffer_read.js
@@ -0,0 +1,28 @@
+var common = require('../common.js');
+
+var bench = common.createBenchmark(main, {
+  noAssert: [false, true],
+  buffer: ['fast', 'slow'],
+  type: ['UInt8', 'UInt16LE', 'UInt16BE',
+         'UInt32LE', 'UInt32BE',
+         'Int8', 'Int16LE', 'Int16BE',
+         'Int32LE', 'Int32BE',
+         'FloatLE', 'FloatBE',
+         'DoubleLE', 'DoubleBE'],
+  millions: [1]
+});
+
+function main(conf) {
+  var noAssert = conf.noAssert === 'true';
+  var len = +conf.millions * 1e6;
+  var clazz = conf.buf === 'fast' ? Buffer : require('buffer').SlowBuffer;
+  var buff = new clazz(8);
+  var fn = 'read' + conf.type;
+
+  buff.writeDoubleLE(0, 0, noAssert);
+  bench.start();
+  for (var i = 0; i < len; i++) {
+    buff[fn](0, noAssert);
+  }
+  bench.end(len / 1e6);
+}
diff --git a/benchmark/buffers/buffer_write.js b/benchmark/buffers/buffer_write.js
@@ -0,0 +1,63 @@
+
+var common = require('../common.js');
+var bench = common.createBenchmark(main, {
+  noAssert: [false, true],
+  buffer: ['fast', 'slow'],
+  type: ['UInt8', 'UInt16LE', 'UInt16BE',
+         'UInt32LE', 'UInt32BE',
+         'Int8', 'Int16LE', 'Int16BE',
+         'Int32LE', 'Int32BE',
+         'FloatLE', 'FloatBE',
+         'DoubleLE', 'DoubleBE'],
+  millions: [1]
+});
+
+const INT8   = 0x7f;
+const INT16  = 0x7fff;
+const INT32  = 0x7fffffff;
+const UINT8  = INT8 * 2;
+const UINT16 = INT16 * 2;
+const UINT32 = INT32 * 2;
+
+var mod = {
+  writeInt8: INT8,
+  writeInt16BE: INT16,
+  writeInt16LE: INT16,
+  writeInt32BE: INT32,
+  writeInt32LE: INT32,
+  writeUInt8: UINT8,
+  writeUInt16BE: UINT16,
+  writeUInt16LE: UINT16,
+  writeUInt32BE: UINT32,
+  writeUInt32LE: UINT32
+};
+
+function main(conf) {
+  var noAssert = conf.noAssert === 'true';
+  var len = +conf.millions * 1e6;
+  var clazz = conf.buf === 'fast' ? Buffer : require('buffer').SlowBuffer;
+  var buff = new clazz(8);
+  var fn = 'write' + conf.type;
+
+  if (fn.match(/Int/))
+    benchInt(buff, fn, len, noAssert);
+  else
+    benchFloat(buff, fn, len, noAssert);
+}
+
+function benchInt(buff, fn, len, noAssert) {
+  var m = mod[fn];
+  bench.start();
+  for (var i = 0; i < len; i++) {
+    buff[fn](i % m, 0, noAssert);
+  }
+  bench.end(len / 1e6);
+}
+
+function benchFloat(buff, fn, len, noAssert) {
+  bench.start();
+  for (var i = 0; i < len; i++) {
+    buff[fn](i * 0.1, 0, noAssert);
+  }
+  bench.end(len / 1e6);
+}