sync Pool for performance

Use sync.Pool to cache frequently allocated and freed objects, reducing garbage collection pressure by reusing instances instead of creating new ones. Define a sync.Pool variable and implement a New function that creates the object, then use Get() to retrieve it and Put() to return it after use.

var myPool = sync.Pool{
	New: func() interface{} {
		return &MyStruct{}
	},
}

func process() {
	obj := myPool.Get().(*MyStruct)
	// use obj
	myPool.Put(obj)
}

sync.Pool is a way to reuse objects in your Go program instead of constantly creating and destroying them. Think of it like a library of reusable tools: you borrow one when you need it and return it when you are done, saving the effort of making a new one every time. This helps your program run faster and use less memory by reducing the work the garbage collector has to do.