bench: Add buffers/dataview_set

1 files changed, 57 insertions, 0 deletions

diff --git a/benchmark/buffers/dataview_set.js b/benchmark/buffers/dataview_set.js
new file mode 100644
index 0000000000..ce0064edb6
--- /dev/null
+++ b/benchmark/buffers/dataview_set.js
@@ -0,0 +1,57 @@
+
+var common = require('../common.js');
+var bench = common.createBenchmark(main, {
+  type: ['Uint8', 'Uint16LE', 'Uint16BE',
+         'Uint32LE', 'Uint32BE',
+         'Int8', 'Int16LE', 'Int16BE',
+         'Int32LE', 'Int32BE',
+         'Float32LE', 'Float32BE',
+         'Float64LE', 'Float64BE'],
+  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 = {
+  setInt8: INT8,
+  setInt16: INT16,
+  setInt32: INT32,
+  setUint8: UINT8,
+  setUint16: UINT16,
+  setUint32: UINT32
+};
+
+function main(conf) {
+  var len = +conf.millions * 1e6;
+  var ab = new ArrayBuffer(8);
+  var dv = new DataView(ab, 0, 8);
+  var le = /LE$/.test(conf.type);
+  var fn = 'set' + conf.type.replace(/[LB]E$/, '');
+
+  if (/int/i.test(fn))
+    benchInt(dv, fn, len, le);
+  else
+    benchFloat(dv, fn, len, le);
+}
+
+function benchInt(dv, fn, len, le) {
+  var m = mod[fn];
+  bench.start();
+  for (var i = 0; i < len; i++) {
+    dv[fn](0, i % m, le);
+  }
+  bench.end(len / 1e6);
+}
+
+function benchFloat(dv, fn, len, le) {
+  bench.start();
+  for (var i = 0; i < len; i++) {
+    dv[fn](0, i * 0.1, le);
+  }
+  bench.end(len / 1e6);
+}