gistfile1.js

function B1() {
  // Benchmark.prototype.setup goes here
  var str = '1.1'; 
  var start = new Date;
  for (...) { // do N iterations of test body
    str++;
  }
  var end = new Date;
};

function B2() {
  // Benchmark.prototype.setup goes here
  var str = '1.1'; 
  var start = new Date;
  for (...) { // do N iterations of test body
    parseFloat(str);
  }
  var end = new Date;
};