[name] pointed out a discrepancy in memory estimation: stated one thing, wrote another. How to correctly estimate memory?

Proper memory assessment in Go requires understanding several aspects: the size of variables, allocation on the stack and heap, as well as the impact of the garbage collector. To accurately evaluate memory usage, you should:

• Use unsafe.Sizeof to estimate the size of specific data types.
• Consider that pointers and slices occupy a fixed size, but the data itself may be located on the heap.
• Understand that when creating structures with nested slices or maps, memory may be allocated unevenly.
• Profile the application using pprof for a real assessment of memory consumption.

For example, if you declare that a structure occupies 64 bytes, but it contains a slice, the actual memory usage may be higher due to data on the heap.

Example of estimating the size of a structure:

package main

import (
    "fmt"
    "unsafe"
)

type MyStruct struct {
    a int64
    b []byte
}

func main() {
    var s MyStruct
    fmt.Println("Sizeof MyStruct:", unsafe.Sizeof(s)) // Size of the structure (pointers and slice length)
    fmt.Println("Length of slice b:", len(s.b))
}

Thus, it is important not only to look at the size of the structure itself but also to consider the memory allocated for dynamic data.