Go - A great language for building web applications

Transcript

1. Go
   Why use it for building web application?
   @sebasporto
   

   View Slide

2. Comparing it to languages I use and love
   Ruby
   JavaScript
   

   View Slide

3. To start with
   + Lightweight
   + Relatively easy to learn
   + Familiar
   

   View Slide

4. It is fast
   

   View Slide

5. Bubble sort benchmark
   #  ruby
   bubble.call([2,  10,  1,  9,  5,  6,  8,  3,  7,  4])
   //  JS
   bubble([2,  10,  1,  9,  5,  6,  8,  3,  7,  4]);
   //  Go
   arr  :=  []int{2,  10,  1,  9,  5,  6,  8,  3,  7,  4}
   bubble(arr)
   Code here
   

   View Slide

6. It is fast!
   190x faster than Ruby
   

   View Slide

7. Concurrency as core feature
   

   View Slide

8. Concurrency - Parallel requests
   

   View Slide

9. View Slide

10. Concurrency - Parallel requests
    Ruby
    Mutex and Threads :(
    EventMachine :(
    

    View Slide

11. Concurrency - Parallel requests
    Node.js
    var  defX  =  Q.defer();
    var  defY  =  Q.defer();
    var  oneAndTwo  =  Q
     .all([defX.promise,  defY.promise])
     .then(processConcat);
     
    requestValue('/x',  defX);
    requestValue('/y',  defY);
    

    View Slide

12. Concurrency - Parallel requests
    Go
    var  cx  chan  string  =  make(chan  string)
    var  cy  chan  string  =  make(chan  string)
    go  requestValue("/x",  cx)
    go  requestValue("/y",  cy)
    x  :=  <-­‐cx
    y  :=  <-­‐cy
    processConcat(x,  y)
    

    View Slide

13. Efficient memory usage
    

    View Slide

14. #  Run  benchmark
    ab  -­‐n  10000  -­‐c  100  http://127.0.0.1:8100/
    Node.js
    FATAL  ERROR:  (...)  process  out  of  memory
    Go
    Time  taken  for  tests:      20.689  seconds
    Complete  requests:            10000
    #  No  problems
    

    View Slide

15. Rich standard library
    + Http
    + Templating
    + JSON
    

    View Slide

16. Static typing (+ IMO)
    + More robust
    + Easier to refactor
    + Less tests
    + Compiler can go crazy with optimisations
    + Still flexible (with interfaces)
    + No ceremony
    

    View Slide

17. Compiled
    But ultra fast
    

    View Slide

18. Single binary
    + Compile and deploy
    + No need to worry about dependencies, e.g. NPM modules, RubyGems
    

    View Slide

19. A lot more
    + Simple and flexible object system - composition
    + Functions as first class
    + Closures
    + Standard formating of source code
    

    View Slide

20. It is great alternative
    Try it!
    

    View Slide

21. Thanks
    @sebasporto
    

    View Slide