diff --git a/_includes/header.html b/_includes/header.html
index 968fcdf84..dc95643bb 100644
--- a/_includes/header.html
+++ b/_includes/header.html
@@ -20,6 +20,7 @@
         <li><a href="http://www.iotjs.net">Powering <b>IoT.js</b></a></li>
       </ul>
       <ul class="nav navbar-nav navbar-right">
+        <li><a href="benchmark/benchmark.html" >Benchmark</a></li>
         {% for p in site.pages %}
           {% if p.title %}
             {% if page.url == p.url %}
diff --git a/benchmark/benchmark.css b/benchmark/benchmark.css
new file mode 100644
index 000000000..b03dd1607
--- /dev/null
+++ b/benchmark/benchmark.css
@@ -0,0 +1,6 @@
+.graph-container {
+ width: 700px;
+ height: 340px;
+ display: inline-block;
+}
+
diff --git a/benchmark/benchmark.html b/benchmark/benchmark.html
new file mode 100644
index 000000000..ac814741e
--- /dev/null
+++ b/benchmark/benchmark.html
@@ -0,0 +1,40 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <meta http-equiv="content-type" content="text/html; charset=UTF-8">
+  <title>jerryscript benchmark</title>
+  
+  <!--link rel="stylesheet" type="text/css" src="benchmark.css"-->
+  <link rel="stylesheet" type="text/css" href="benchmark.css">
+  <script type="text/javascript" src="https://www.google.com/jsapi"></script>
+  <script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.4/jquery.min.js"></script>
+  <script type='text/javascript' src="benchmark.js"></script>
+</head>
+
+<body>
+
+<h1>Jerryscript Benchmark</h1>
+<p>
+  <span style="font-weight: bold; color: blue;">lower is better</span>
+  for both memory and performance.
+</p>
+<div class="container">
+
+<div id="wrapper_sunspider-1.0.2" class="content">
+<h3>sunspider-1.0.2</h3>
+<div id="chart_sunspider-1.0.2_memory" class="graph-container"></div>
+<div id="chart_sunspider-1.0.2_performance" class="graph-container"></div>
+</div>
+
+<div id="wrapper_ubench">
+<h3>ubench</h3>
+<div id="chart_ubench_memory" class="graph-container"></div>
+<div id="chart_ubench_performance" class="graph-container"></div>
+</div>
+
+</div><!-- container -->
+
+</body>
+
+</html>
+
diff --git a/benchmark/benchmark.js b/benchmark/benchmark.js
new file mode 100644
index 000000000..26a381084
--- /dev/null
+++ b/benchmark/benchmark.js
@@ -0,0 +1,197 @@
+///////////////////////////////////////////
+// helper functions
+///////////////////////////////////////////
+
+Array.prototype.clone = function() {
+  return this.slice(0);
+};
+
+Array.prototype.sum = function() {
+  return this.reduce(function(a, b) { return a + b; });
+};
+
+Date.prototype.toFormattedString = function() {
+  var yyyy = this.getFullYear().toString();
+  var mm = (this.getMonth() + 1).toString();
+  var dd = this.getDate().toString();
+  mm = mm[1] ? mm : '0' + mm;
+  dd = dd[1] ? dd : '0' + dd;
+  return yyyy + '-' + mm + '-' + dd;
+};
+
+Object.values = function(obj) {
+  return Object.keys(obj).map(function(key) { return obj[key]; });
+};
+
+function getParameterByName(name) {
+  name = name.replace(/[\[]/, "\\[").replace(/[\]]/, "\\]");
+  var regex = new RegExp("[\\?&]" + name + "=([^&#]*)"),
+      results = regex.exec(location.search);
+  return results === null ? "" : decodeURIComponent(results[1].replace(/\+/g, " "));
+}
+
+function wrapTooltip(content) {
+  return '<div style="padding: 0.5em; font-family: consolas; line-height: 1.5em;">' + content + '</div>';
+}
+
+function wrapHyperlink(address, text) {
+  return '<a href="' + address + '" target="_blank">' + text + '</a>'
+}
+
+///////////////////////////////////////////
+// main module
+///////////////////////////////////////////
+
+var benchmarks = ['sunspider-1.0.2', 'ubench'];
+var measureTypes = ['memory', 'performance'];
+var measureUnits = {'memory': 'kb', 'performance': 's'};
+var engines = ['jerryscript', 'jerryscript-snapshot', 'duktape'];
+var link_main = {
+  'jerryscript': 'http://www.jerryscript.net',
+  'duktape':     'http://duktape.org'
+};
+var link_code = {
+  'jerryscript': 'https://github.com/Samsung/jerryscript/commit/',
+  'duktape':     'https://github.com/svaarala/duktape/commit/'
+};
+var beginDate = new Date('2015-07-10');
+
+var benchmarkData = {};
+
+google.load('visualization', '1', {packages: ['corechart', 'line']});
+google.setOnLoadCallback(main);
+
+function main() {
+  var data_src = getParameterByName('src');
+  if (!data_src)
+    data_src = 'data';
+  // fetch data via ajax
+  var today = new Date();
+  for (var d = beginDate; d <= today; d.setDate(d.getDate() + 1)) {
+    var curDate = (new Date(d)).toFormattedString();
+    $.ajax({
+      _date: curDate,
+      url: data_src + '/' + curDate + '.json',
+      dataType: 'json',
+      success: function(data) {
+        benchmarkData[this._date] = data;
+      },
+      error: function(request, status, error) {
+      }
+    });
+  }
+}
+
+$(document).ajaxStop(function () {
+  benchmarks.forEach(function(benchmark) {
+  measureTypes.forEach(function(measureType) {
+    // transform data for internal use
+    var transData = {}, transInfo = {};
+    $.each(benchmarkData, function(date, element) {
+      transData[date] = [];
+      transInfo[date] = element['info'];
+      engines.forEach(function(engine, index) {
+        var repVal = undefined;   // default value
+        var benchmark_obj = element[benchmark];
+        if (benchmark_obj) {
+          var record =  benchmark_obj[measureType][engine];
+          if (record) {
+            // record object contains a lot of subtests,
+            // we use sum of all values as representative value
+            var values = Object.values(record);
+            repVal = values.sum();
+          }
+        }
+        transData[date][index] = repVal;
+      });
+    });
+
+    // transform data for google charts
+    var data = new google.visualization.DataTable();
+    data.addColumn('date', 'Date');
+    engines.forEach(function(engine) {
+      data.addColumn('number', engine);
+      data.addColumn({type: 'string', role: 'tooltip', 'p': {'html': true}});
+    });
+    var arrayData = Object.keys(transData).sort().map(function(date) {
+      // data
+      var row = Object.values(transData[date]);
+      // tooltip
+      var tooltips = row.clone().map(function(value, index) {
+        var engine = engines[index];
+        var engine_pure = engine.split('-')[0];
+        var info = transInfo[date] ? transInfo[date][engine_pure] : undefined;
+        var score = value ? value.toFixed(2) + measureUnits[measureType] : '';
+        var info_text = '';
+        if (info && info.version)
+          info_text = wrapHyperlink(link_code[engine_pure] + info.version, info.version);
+        var engine_text = wrapHyperlink(link_main[engine_pure], engine);
+        var textData = [
+            ['source&nbsp; ', engine_text],
+            ['version ', info_text],
+            ['date&nbsp;&nbsp;&nbsp; ', date],
+            ['score&nbsp;&nbsp; ', score]];
+        return wrapTooltip(textData.map(function(v) { return v.join(': '); }).join('<br />'));
+      });
+
+      // zip data and tooltips
+      // so the array will be like [data, tooltip, data, tooltip, ...]
+      row = row.map(function (v, i) {
+        return [v, tooltips[i]];
+      }).reduce(function(a, b) {
+        return a.concat(b)
+      });
+      return [new Date(date)].concat(row);
+    });
+    data.addRows(arrayData);
+
+    // chart options
+    var options = {
+      title: measureType,
+      titleTextStyle: {
+        fontSize: 20,
+        bold: true
+      },
+      fontName: 'consolas',
+      legend: { position: 'bottom' },
+      backgroundColor: '#f8f8f8',
+      hAxis: {
+        title: 'Date',
+        textStyle: {
+          fontSize: 12,
+          bold: false
+        },
+        titleTextStyle: {
+          fontSize: 16,
+          bold: true
+        },
+        format: 'yyyy-MM-dd'
+      },
+      vAxis: {
+        minValue: 0,
+        title: measureType + ' (' + measureUnits[measureType] + ')',
+        textStyle: {
+          fontSize: 12,
+          bold: false
+        },
+        titleTextStyle: {
+          fontSize: 16,
+          bold: true
+        }
+      },
+      tooltip: {
+        isHtml: true,
+        trigger: 'both'
+      }
+    };
+
+    // draw chart
+    var divObj = document.getElementById(
+        ['chart', benchmark, measureType].join('_'));
+    if (divObj) {
+      var chart = new google.visualization.LineChart(divObj);
+      chart.draw(data, options);
+    }
+  });
+  });
+});
diff --git a/benchmark/data/2015-07-10.json b/benchmark/data/2015-07-10.json
new file mode 100644
index 000000000..8f5ea6978
--- /dev/null
+++ b/benchmark/data/2015-07-10.json
@@ -0,0 +1,124 @@
+{
+    "info": {
+        "jerryscript": {
+            "version": "8d7cdebee09d9fcccb85b47efa4e84341f065607",
+            "size": 173764
+        },
+        "duktape": {
+            "version": "cd2c19761b07e8d675f2079328fbfc9dd9c3b83a",
+            "size": 157632
+        }
+    },
+    "sunspider-1.0.2": {
+        "performance": {
+            "jerryscript": {
+                "math-spectral-norm.js": 4.568,
+                "3d-cube.js": 6.05467,
+                "access-fannkuch.js": 16.1653,
+                "access-nbody.js": 7.17867,
+                "bitops-bitwise-and.js": 5.47867,
+                "math-partial-sums.js": 3.116,
+                "controlflow-recursive.js": 4.35467,
+                "bitops-bits-in-byte.js": 7.20667,
+                "access-binary-trees.js": 3.71067,
+                "bitops-3bit-bits-in-byte.js": 5.09333,
+                "string-fasta.js": 27.308,
+                "math-cordic.js": 8.27333
+            },
+            "duktape": {
+                "math-spectral-norm.js": 1.05467,
+                "3d-cube.js": 1.18533,
+                "access-fannkuch.js": 1.97733,
+                "access-nbody.js": 1.736,
+                "bitops-bitwise-and.js": 7.26267,
+                "math-partial-sums.js": 2.812,
+                "controlflow-recursive.js": 1.24667,
+                "bitops-bits-in-byte.js": 0.922667,
+                "access-binary-trees.js": 1.30133,
+                "bitops-3bit-bits-in-byte.js": 0.590667,
+                "string-fasta.js": 4.72267,
+                "math-cordic.js": 2.52933
+            }
+        },
+        "memory": {
+            "jerryscript": {
+                "math-spectral-norm.js": 48,
+                "3d-cube.js": 160,
+                "access-fannkuch.js": 52,
+                "access-nbody.js": 68,
+                "bitops-bitwise-and.js": 28,
+                "math-partial-sums.js": 40,
+                "controlflow-recursive.js": 224,
+                "bitops-bits-in-byte.js": 32,
+                "access-binary-trees.js": 84,
+                "bitops-3bit-bits-in-byte.js": 36,
+                "string-fasta.js": 56,
+                "math-cordic.js": 48
+            },
+            "duktape": {
+                "math-spectral-norm.js": 144,
+                "3d-cube.js": 192,
+                "access-fannkuch.js": 148,
+                "access-nbody.js": 156,
+                "bitops-bitwise-and.js": 140,
+                "math-partial-sums.js": 144,
+                "controlflow-recursive.js": 184,
+                "bitops-bits-in-byte.js": 140,
+                "access-binary-trees.js": 208,
+                "bitops-3bit-bits-in-byte.js": 140,
+                "string-fasta.js": 156,
+                "math-cordic.js": 144
+            }
+        }
+    },
+    "ubench": {
+        "performance": {
+            "jerryscript": {
+                "loop-empty.js": 46.9453,
+                "function-empty.js": 32.0587,
+                "function-excess-args.js": 62.6253,
+                "function-closure.js": 5.292,
+                "function-missing-args.js": 65.1613,
+                "loop-sum.js": 52.168,
+                "loop-empty-resolve.js": 5.37467,
+                "function-correct-args.js": 87.68,
+                "function-sum.js": 48.6573
+            },
+            "duktape": {
+                "loop-empty.js": 55.852,
+                "function-empty.js": 40.1813,
+                "function-excess-args.js": 32.3107,
+                "function-closure.js": 19.8533,
+                "function-missing-args.js": 31.0227,
+                "loop-sum.js": 73.5733,
+                "loop-empty-resolve.js": 6.74267,
+                "function-correct-args.js": 32.3707,
+                "function-sum.js": 26.7733
+            }
+        },
+        "memory": {
+            "jerryscript": {
+                "loop-empty.js": 24,
+                "function-empty.js": 28,
+                "function-excess-args.js": 32,
+                "function-closure.js": 32,
+                "function-missing-args.js": 32,
+                "loop-sum.js": 24,
+                "loop-empty-resolve.js": 24,
+                "function-correct-args.js": 32,
+                "function-sum.js": 32
+            },
+            "duktape": {
+                "loop-empty.js": 140,
+                "function-empty.js": 140,
+                "function-excess-args.js": 140,
+                "function-closure.js": 472,
+                "function-missing-args.js": 140,
+                "loop-sum.js": 140,
+                "loop-empty-resolve.js": 140,
+                "function-correct-args.js": 140,
+                "function-sum.js": 140
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/benchmark/data/2015-07-17.json b/benchmark/data/2015-07-17.json
new file mode 100644
index 000000000..cc79d4419
--- /dev/null
+++ b/benchmark/data/2015-07-17.json
@@ -0,0 +1,124 @@
+{
+    "info": {
+        "jerryscript": {
+            "version": "6038173e76265ab30ae7b5b70a4d20633e1de9b7",
+            "size": 181960
+        },
+        "duktape": {
+            "version": "cd2c19761b07e8d675f2079328fbfc9dd9c3b83a",
+            "size": 157632
+        }
+    },
+    "sunspider-1.0.2": {
+        "performance": {
+            "jerryscript": {
+                "math-spectral-norm.js": 4.75067,
+                "3d-cube.js": 6.684,
+                "access-fannkuch.js": 16.3333,
+                "access-nbody.js": 7.148,
+                "bitops-bitwise-and.js": 5.38,
+                "math-partial-sums.js": 3.38267,
+                "controlflow-recursive.js": 4.46133,
+                "bitops-bits-in-byte.js": 7.872,
+                "access-binary-trees.js": 3.34533,
+                "bitops-3bit-bits-in-byte.js": 5.38933,
+                "string-fasta.js": 36.2467,
+                "math-cordic.js": 8.69333
+            },
+            "duktape": {
+                "math-spectral-norm.js": 1.048,
+                "3d-cube.js": 1.17333,
+                "access-fannkuch.js": 1.98267,
+                "access-nbody.js": 1.74533,
+                "bitops-bitwise-and.js": 7.28533,
+                "math-partial-sums.js": 2.82667,
+                "controlflow-recursive.js": 1.24933,
+                "bitops-bits-in-byte.js": 0.936,
+                "access-binary-trees.js": 1.3,
+                "bitops-3bit-bits-in-byte.js": 0.592,
+                "string-fasta.js": 4.724,
+                "math-cordic.js": 2.55067
+            }
+        },
+        "memory": {
+            "jerryscript": {
+                "math-spectral-norm.js": 48,
+                "3d-cube.js": 168,
+                "access-fannkuch.js": 52,
+                "access-nbody.js": 68,
+                "bitops-bitwise-and.js": 28,
+                "math-partial-sums.js": 40,
+                "controlflow-recursive.js": 236,
+                "bitops-bits-in-byte.js": 32,
+                "access-binary-trees.js": 92,
+                "bitops-3bit-bits-in-byte.js": 36,
+                "string-fasta.js": 56,
+                "math-cordic.js": 48
+            },
+            "duktape": {
+                "math-spectral-norm.js": 144,
+                "3d-cube.js": 192,
+                "access-fannkuch.js": 148,
+                "access-nbody.js": 156,
+                "bitops-bitwise-and.js": 140,
+                "math-partial-sums.js": 144,
+                "controlflow-recursive.js": 184,
+                "bitops-bits-in-byte.js": 140,
+                "access-binary-trees.js": 208,
+                "bitops-3bit-bits-in-byte.js": 140,
+                "string-fasta.js": 156,
+                "math-cordic.js": 144
+            }
+        }
+    },
+    "ubench": {
+        "performance": {
+            "jerryscript": {
+                "loop-empty.js": 45.9067,
+                "function-empty.js": 32.6907,
+                "function-excess-args.js": 63.4693,
+                "function-closure.js": 5.23867,
+                "function-missing-args.js": 65.5507,
+                "loop-sum.js": 50.8533,
+                "loop-empty-resolve.js": 5.14,
+                "function-correct-args.js": 88.3947,
+                "function-sum.js": 49.2693
+            },
+            "duktape": {
+                "loop-empty.js": 55.9933,
+                "function-empty.js": 40.148,
+                "function-excess-args.js": 32.2773,
+                "function-closure.js": 19.796,
+                "function-missing-args.js": 30.9907,
+                "loop-sum.js": 73.6307,
+                "loop-empty-resolve.js": 6.74667,
+                "function-correct-args.js": 32.3293,
+                "function-sum.js": 26.756
+            }
+        },
+        "memory": {
+            "jerryscript": {
+                "loop-empty.js": 24,
+                "function-empty.js": 28,
+                "function-excess-args.js": 32,
+                "function-closure.js": 32,
+                "function-missing-args.js": 32,
+                "loop-sum.js": 24,
+                "loop-empty-resolve.js": 24,
+                "function-correct-args.js": 32,
+                "function-sum.js": 32
+            },
+            "duktape": {
+                "loop-empty.js": 140,
+                "function-empty.js": 140,
+                "function-excess-args.js": 140,
+                "function-closure.js": 472,
+                "function-missing-args.js": 140,
+                "loop-sum.js": 140,
+                "loop-empty-resolve.js": 140,
+                "function-correct-args.js": 140,
+                "function-sum.js": 140
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/benchmark/data/2015-07-24.json b/benchmark/data/2015-07-24.json
new file mode 100644
index 000000000..524e2b899
--- /dev/null
+++ b/benchmark/data/2015-07-24.json
@@ -0,0 +1,124 @@
+{
+    "info": {
+        "jerryscript": {
+            "version": "11c310322b0b09e8d60c72ee5263798938a8d9e0",
+            "size": 186056
+        },
+        "duktape": {
+            "version": "5b2a3f53f020b816957129ac448efad1b701e895",
+            "size": 157632
+        }
+    },
+    "sunspider-1.0.2": {
+        "performance": {
+            "jerryscript": {
+                "math-spectral-norm.js": 4.72667,
+                "3d-cube.js": 6.69467,
+                "access-fannkuch.js": 16.3,
+                "access-nbody.js": 7.104,
+                "bitops-bitwise-and.js": 5.34267,
+                "math-partial-sums.js": 3.364,
+                "controlflow-recursive.js": 4.50667,
+                "bitops-bits-in-byte.js": 7.96533,
+                "access-binary-trees.js": 3.39067,
+                "bitops-3bit-bits-in-byte.js": 5.45467,
+                "string-fasta.js": 36.4027,
+                "math-cordic.js": 8.74267
+            },
+            "duktape": {
+                "math-spectral-norm.js": 1.03333,
+                "3d-cube.js": 1.17067,
+                "access-fannkuch.js": 1.97333,
+                "access-nbody.js": 1.75067,
+                "bitops-bitwise-and.js": 7.292,
+                "math-partial-sums.js": 2.82267,
+                "controlflow-recursive.js": 1.248,
+                "bitops-bits-in-byte.js": 0.934667,
+                "access-binary-trees.js": 1.29867,
+                "bitops-3bit-bits-in-byte.js": 0.592,
+                "string-fasta.js": 4.676,
+                "math-cordic.js": 2.53867
+            }
+        },
+        "memory": {
+            "jerryscript": {
+                "math-spectral-norm.js": 48,
+                "3d-cube.js": 168,
+                "access-fannkuch.js": 52,
+                "access-nbody.js": 68,
+                "bitops-bitwise-and.js": 28,
+                "math-partial-sums.js": 40,
+                "controlflow-recursive.js": 236,
+                "bitops-bits-in-byte.js": 32,
+                "access-binary-trees.js": 92,
+                "bitops-3bit-bits-in-byte.js": 36,
+                "string-fasta.js": 56,
+                "math-cordic.js": 48
+            },
+            "duktape": {
+                "math-spectral-norm.js": 144,
+                "3d-cube.js": 192,
+                "access-fannkuch.js": 148,
+                "access-nbody.js": 156,
+                "bitops-bitwise-and.js": 140,
+                "math-partial-sums.js": 144,
+                "controlflow-recursive.js": 184,
+                "bitops-bits-in-byte.js": 140,
+                "access-binary-trees.js": 208,
+                "bitops-3bit-bits-in-byte.js": 140,
+                "string-fasta.js": 156,
+                "math-cordic.js": 144
+            }
+        }
+    },
+    "ubench": {
+        "performance": {
+            "jerryscript": {
+                "loop-empty.js": 45.764,
+                "function-empty.js": 33.0893,
+                "function-excess-args.js": 63.9267,
+                "function-closure.js": 5.91733,
+                "function-missing-args.js": 65.9853,
+                "loop-sum.js": 50.5267,
+                "loop-empty-resolve.js": 5.22133,
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new file mode 100644
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new file mode 100644
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diff --git a/benchmark/data/2015-08-28.json b/benchmark/data/2015-08-28.json
new file mode 100644
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diff --git a/benchmark/data/2015-09-11.json b/benchmark/data/2015-09-11.json
new file mode 100644
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new file mode 100644
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new file mode 100644
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diff --git a/benchmark/data/2015-10-07.json b/benchmark/data/2015-10-07.json
new file mode 100644
index 000000000..8a25c878b
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diff --git a/benchmark/data/2015-10-08.json b/benchmark/data/2015-10-08.json
new file mode 100644
index 000000000..6ba4f10f3
--- /dev/null
+++ b/benchmark/data/2015-10-08.json
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