Go vs Ruby
Side-by-side comparison of Go and Ruby — syntax, concurrency, and trade-offs.
Ruby favors developer happiness and expressiveness. Go favors simplicity, performance, and explicit error handling. Both are excellent for building services — the choice depends on your priorities.
| Feature | Go | Ruby |
|---|---|---|
| Typing | Static, compiled | Dynamic, interpreted |
| Variable | x := 42 |
x = 42 |
| Function | func add(a, b int) int { return a + b } |
def add(a, b) = a + b |
| Array / Slice | nums := []int{1, 2, 3} |
nums = [1, 2, 3] |
| Map | m := map[string]int{"a": 1} |
m = { "a" => 1 } |
| Struct / Class | type User struct { Name string } |
User = Struct.new(:name) |
| Error handling | result, err := doThing(); if err != nil { ... } |
result = do_thing rescue nil |
| Loop | for i := 0; i < 5; i++ { } |
5.times { |i| } |
| Iteration | for _, v := range nums { } |
nums.each { |v| } |
| String interp | fmt.Sprintf("Hello %s", name) |
"Hello #{name}" |
| Concurrency | Goroutines + channels | Threads + Queue |
| Module system | Packages via import |
require / gem |
| Testing | go test built-in |
rspec gem |
| Compilation | Compiled to binary | Interpreted |
| Startup time | Fast | Slow (Rails尤其) |
Concurrency Comparison
Go — Goroutines & Channels
ch := make(chan int, 2)
go func() { ch <- 42 }()
val := <-ch
Ruby — Threads & Queue
queue = Queue.new
Thread.new { queue.push(42) }
val = queue.pop
Go’s goroutines are lightweight (~2KB stack) and multiplexed across OS threads. Ruby threads are OS-level and limited by the GIL for CPU work.
When to Choose Go
- You need high throughput and low latency
- You want a single static binary for deployment
- Your team values explicit error handling and simplicity
- You’re building infrastructure, APIs, or CLI tools
When to Choose Ruby
- Developer productivity is the top priority
- You’re building web applications (Rails ecosystem)
- You want metaprogramming and DSLs
- Your team values convention over configuration