How does Golang manage automatic memory cleanup and garbage collection?

Go's memory management is automated through the built-in garbage collector (GC). It is responsible for freeing memory that is no longer used by the program to prevent leaks.

The garbage collector in Go is based on a tracing and reference counting algorithm. It periodically pauses the program (stop-the-world) for a very short time to identify which objects are still reachable (in use) and which are not. Unreachable objects are considered garbage and are freed.

Features of Go's GC:

• Parallel and concurrent: the collection occurs simultaneously with program execution, minimizing pauses.
• Optimized for low latency, which is important for server applications.
• Automatically manages the heap, freeing memory without programmer intervention.

Example of memory usage in Go does not require explicit freeing:

func main() {
    data := make([]int, 1000) // allocate memory
    // use data
    _ = data
} // after exiting the function, the garbage collector will free the memory if data is no longer used