Go

Why use it for building web application?

@sebasporto

Comparing it to languages I use and love

Ruby

JavaScript

To start with

• + Lightweight
• + Relatively easy to learn
• + Familiar

It is fast

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

It is fast!

190x faster than Ruby

Concurrency as core feature

Concurrency - Parallel requests

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);

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)

Efficient memory usage

# 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

Rich standard library

• + Http
• + Templating
• + JSON

Static typing (+ IMO)

• + More robust
• + Easier to refactor
• + Less tests
• + Compiler can go crazy with optimisations
• + Still flexible (with interfaces)
• + No ceremony

Compiled

But ultra fast

Single binary

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

A lot more

• + Simple and flexible object system - composition
• + Functions as first class
• + Closures
• + Standard formating of source code

It is great alternative

Try it!

Thanks

@sebasporto