lazy

Benchmark created by Calvin on

Preparation HTML

<script src="http://dtao.github.io/lazy.js/lazy.js">
</script>
<script src="http://dtao.github.io/lazy.js/docs/lib/underscore.js">
</script>
<script src="http://dtao.github.io/lazy.js/docs/lib/lodash.js">
</script>
<script>
  window.lodash = _.noConflict();
</script>

Setup

function square(x) {
      return x * x;
    }
    
    function inc(x) {
      return x + 1;
    }
    
    function isEven(x) {
      return x % 2 === 0;
    }
    var array = Lazy.range(1000).toArray();

Test runner

Ready to run.

Testing in
TestOps/sec
underscore
var result = _.chain(array).map(square).map(inc).filter(isEven).take(5).value();
ready
loop
var results = [];
for (var i = 0; i < array.length; ++i) {
  var value = (array[i] * array[i]) + 1;
  if (value % 2 === 0) {
    results.push(value);
    if (results.length === 5) {
      break;
    }
  }
}
ready
lazy
var result = Lazy(array).map(square).map(inc).filter(isEven).take(5).toArray();
ready
lodash
var result = lodash(array).map(square).map(inc).filter(isEven).take(5).value();
ready
optimized loop
var len = array.length,
    outLen = 5,
    results = new Array(outLen),
    rlen = 0;
for (var i = 0; i < len; ++i) {
  var value = (array[i] * array[i]) + 1;
  if (value % 2 === 0) {
    results[rlen] = value;
    rlen++;
    if (rlen === outLen) {
      break;
    }
  }
}
ready

Revisions

You can edit these tests or add more tests to this page by appending /edit to the URL.