Switch vs. Array Index

At the last Javascript Meetup Cambridge I was showing off a Javascript Web Worker Network I have been working on for visualizing search queries. I showed the code to @geowa4, @AlbertoPL and another guy who's name I forget. @geowa4 pointed out that I could use look up the function directly from the object (which I had avoided thinking switch was faster), and someone else chimed in that the switch I was already using would be faster... and I was like... "yeah, get back in your place student n00b!"

Obviously... this had to be tested!

var obj = [];
var len = 10;
for( var i = 0; i < len; i++ ){
obj[i] = function(){ return 1 };
}
obj[ 10 ] = function( mn, inc ){
time = new Date().getTime() - time;
console.log( 'Method #' + mn + ': ' + time + 'ms, Check: ' + ( inc == 20000000 ) );
};

var time;
var times = 2000000;

function method1(){
time = new Date().getTime();
var inc = 0;
for( var t = 0; t < times; t++ ){
 for( var i = 0; i < len; i++ ){
   inc += obj[ i ]();
 }
}
obj[ 10 ]( 1, inc ) ;

// run next method
method2();
}

function method2(){
time = new Date().getTime();
var inc = 0;
for( var t = 0; t < times; t++ ){
 for( var i = 0; i < len; i++ ){
   switch( i ){
     case 0: inc += obj[0](); break;
     case 1: inc += obj[1](); break;
     case 2: inc += obj[2](); break;
     case 3: inc += obj[3](); break;
     case 4: inc += obj[4](); break;
     case 5: inc += obj[5](); break;
     case 6: inc += obj[6](); break;
     case 7: inc += obj[7](); break;
     case 8: inc += obj[8](); break;
     case 9: inc += obj[9](); break;
   }
 }
}
obj[ 10 ]( 2, inc );
}

method1();

The results:
ARRAY --> Method #1: 257ms, Check: true
SWITCH --> Method #2: 7344ms, Check: true

Congratulations @geowa4 wins! IOU 1 beer.


Conclusion:
Never under-estimate the student n00b. Even if they don't know what they're talking about... they're probably still right. XD