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How to create slices?

Assume the type of a new created slice is S and s0 is the zero value literal of S.

Way 1 (use composite literals) 

	var aSlice = S{} // both length and capacity are zero
	// or
	var aSlice = S{Len - 1: s0} // both length and capacity are Len (a constant)

The capacity of the result slice is not always aligned to a memory class size. (Memory class sizes are mentioned in Go Optimizations 101.)

Way 2 (use the built-in make function): 

	var aSlice = make(S, initialLength, capacity)
	// or
	var aSlice = make(S, initialLength) // capacity == initialLength

The capacity of the result slice is not always aligned to a memory class size.

Way 3 (use the built-in append + make functions): 

	var aSlice = append(S{}, make(S, initialLength)...)
	// or
	var aSlice = append(S(nil), make(S, initialLength)...)
	// or
	var aSlice = append(S{}, make(S, initialLength, capacity)...)
	// or
	var aSlice = append(S(nil), make(S, initialLength, capacity)...)

With the official toolchain, the capacity of the result slice is aligned to a memory class size.

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