Ember.js: And benchmarks for all

Ember.js

And benchmarks for all

Alex navasardyan

@twokul

hire us!

IT all started with

COMPOSABLE COMPUTED PROPERTIES

Example

 var Person = Ember.Object.extend({   napTime: and(     equal('state', 'sleepy'),     not('thirsty'),     not('hungry')   ) });
 var Alex = Person.create({   state:   'sleepy',   thirsty: true,   hungry:  false });  Alex.get('napTime'); // => false

did we mess something uP?

probably

How do we verify it?

BENCHMARKS

BENChmark

is a way to measure things

(what is the unit of measure?)

Pattern a

 var totalTime,
     start = new Date,
     iterations = 6;
 while (iterations--) {
   // Code snippet goes here
 }
 // the number of milliseconds it took to execute the code snippet 6 times
totalTime = new Date - start;

Pattern b

 var hz, period, startTime = new Date, runs = 0;
 do {
   // Code snippet goes here
   runs++;
   totalTime = new Date - startTime;
 } while (totalTime < 1000);
 // the number of operations per second
 hz = (runs * 1000) / totalTime;

micro benchmarks

benchmark

 function benchmarksForAll() {
   var i = '12345', j;
   var start = Date.now();   for (var n = 0; n < 1e6; n++) {
     j = ~~i;
   }
   return (Date.now() - start);
 }

benchmark

 function benchmarksForAll() {
   var j;
   var start = Date.now()
   for (var n = 0; n < 1e6; n++) {
     j = ~~'12345';
   }
   return (Date.now() - start);
 }

benchmark

 function benchmarksForAll() {
   var j;
   var start = Date.now()
   for (var n = 0; n < 1e6; n++) {
     j = 12345;
   }
   return (Date.now() - start);
 }

And we measured ...

Alex navasardyan

@twokul

hire us!

IT all started with

Example

did we mess something uP?

probably

How do we verify it?

BENCHMARKS

BENChmark

Pattern a

Pattern b

micro benchmarks

benchmark

benchmark

benchmark

And we measured ...

ember benchmarks & demo