Golang type's memory layout
Package mlayout try to describe golang type's memory layout, especially struct's. According to language's implements, different order of fields use different memory layout, so different memory use ratio sometimes.
Here is a simple example, two structs with different fields order.
type t1 struct {
a bool
b int
c bool
}
type t2 struct {
a bool
b bool
c int
}
fmt.Printf("t1:\n%s\n", mlayout.Layoutof(t1{}))
fmt.Printf("t2:\n%s", mlayout.Layoutof(t2{}))
// Output:
// t1:
// x_______
// xxxxxxxx
// x_______
// t2:
// xx______
// xxxxxxxx
So we could try to imporve the struct's use ratio of memory with this, by adjusting struct's fields order.
Installation
go get -u github.com/leeychee/mlayout
Usage
For now, you can use the lib to get a type's use ratio of memory, and ascii image.
type t1 struct {
a bool
b int
c bool
}
l := mlayout.Layoutof(t1{})
fmt.Printf("t1's use ratio is %.2f", l.UseRatio())
fmt.Printf("t1's acsii image is: \n%s\n", l)
TODO
Maybe, we could build a cmd tool to analysis structs, and give some advices.