What methods can be applied to optimize garbage collector performance and improve memory usage efficiency in a program?

To optimize garbage collection (GC) in Go and improve memory efficiency, the following methods can be applied:

• Minimize allocations: try to reuse objects and buffers to reduce GC load.
• Use object pools (sync.Pool): allows reusing objects without constant memory allocation.
• Avoid creating large temporary structures: especially in hot code paths.
• Configure GC parameters: through the environment variable GOGC, you can adjust the frequency of GC runs (for example, increase the value to decrease frequency).
• Memory profiling: using pprof to identify leaks and hot spots in allocations.

Example of using sync.Pool:

var bufPool = sync.Pool{
    New: func() interface{} {
        return make([]byte, 1024) // 1KB buffer
    },
}

func process() {
    buf := bufPool.Get().([]byte)
    defer bufPool.Put(buf)
    // use buf
}