Creating and running suites is very easy thanks to the benchmark tool. All we will need is to set up our sets-arr.js file, and we are good-to-go:

var Benchmark = require("benchmark");
var suite = new Benchmark.Suite();

var set = new Set();
var arr = [];

for(var i=0; i < 1000; i++) {
   set.add(i);
   arr.push(i);
}


suite
   .add("array #indexOf", function(){
      arr.indexOf(100) > -1;
   })
   .add("set #has", function(){
      set.has(100);
   })
   .add("array #splice", function(){
      arr.splice(99, 1);
   })
   .add("set #delete", function(){
      set.delete(99);
   })
   .add("array #length", function(){
      arr.length;
   })
   .add("set #size", function(){
      set.size;
   })
   .on("cycle", function(e) {
      console.log("" + e.target);
   })
   .run();

You can see that the setup is pretty self-explanatory. Once we create the new suite, we set up some data for the initial load and then we can add our tests to the suite:

var set = new Set();
var arr = [];

for(var i=0; i < 1000; i++) {
    set.add(i);
    arr.push(i);
}

To execute this suite, you can run the following command from a Terminal:

node sets-arr.js

The results of the suite are as follows:

Note that the sets are a little faster than the arrays in this setup. Of course, the data that we are using in the tests can also cause variations in the results; you can try this out by switching between the data types that are being stored in the array and the set.