7 Reasons a 10‑Year Java Veteran Switched to Go

Reason 1: Development Speed

When writing a new software project, the author now always chooses Go because he can finish the implementation in a shorter time. Go code is more readable and less abstract, focusing directly on the task‑level logic instead of boilerplate such as getters, setters, and class hierarchies. This reduces both coding time and mental overhead.

In a personal test, three colleagues were asked to explain a simple snippet written in Java, C#, and Go. The Java and C# versions confused the colleagues (who are now PHP developers), while the Go version was instantly understood.

Reason 2: Deployment Speed

Go builds extremely fast, allowing the author to make iterative changes and see results immediately, regardless of project size. Deploying a binary to the three major operating systems—Windows, Linux, and macOS—is described as "a piece of cake".

Reason 3: Single Way (Uniformity)

Because Go enforces a single formatting style decided by the language designers, code written months or years apart remains easy to read. The author contrasts this with C#, where he remembers roughly seven different ways to convert an integer to a string, leading to confusion when revisiting older code.

Reason 4: Binary Size

Smaller binaries mean faster deployment and less network transfer. In the author's company Docker images are used as the runtime environment. Measured sizes show a C# image of 40+ MB versus a Go image of 3+ MB for the same functionality.

Reason 5: Standard Library

Go ships with an extensive standard library (stdlib) that allows developers to implement almost any feature without pulling third‑party modules, reducing dependency management overhead.

Reason 6: Goroutine

Goroutine provides lightweight concurrency. While a Java or C# thread typically allocates about 1 MB of memory, a Go goroutine starts with roughly 2 KB, making massive concurrency cheap. go function() This single‑line syntax launches a function in its own goroutine, which the author found surprisingly simple.

Reason 7: Web Server

Running a minimal web server in Go is straightforward. The following example uses the third‑party router github.com/julienschmidt/httprouter to serve static files and listen on port 80:

package main

import (
    "github.com/julienschmidt/httprouter"
    "net/http"
)

func main() {
    router := httprouter.New()
    router.ServeFiles("/data", http.Dir("data"))
    _ = http.ListenAndServe(":80", router)
}

The same functionality can be achieved without any third‑party library:

package main

import (
    "net/http"
)

func main() {
    http.Handle("/", http.FileServer(http.Dir("./data")))
    _ = http.ListenAndServe(":80", nil)
}

Conclusion

Initially skeptical about Go, the author was persuaded after learning about goroutines and the ease of building a web server. He switched from Java and C# to Go and now recommends others try it, noting the surprising boost in productivity.