Performance difference between inline structs and global structs

result

# go test -bench .
BenchmarkInlineStruct-8   	2000000000	         0.37 ns/op
BenchmarkGlobalStruct-8   	2000000000	         0.30 ns/op
PASS
ok  	github.com/Mumakil/testing	1.476s

struct_test.go

package testing_test

import "testing"

func BenchmarkInlineStruct(b *testing.B) {
	accu := 0
	for i := 0; i < b.N; i++ {
		type LocalStruct struct {
			Foo int
			Bar string
		}
		ls := LocalStruct{
			Foo: 1,
			Bar: "foo",
		}
		accu += ls.Foo
	}
}

type GlobalStruct struct {
	Foo int
	Bar string
}

func BenchmarkGlobalStruct(b *testing.B) {
	accu := 0
	for i := 0; i < b.N; i++ {
		gs := GlobalStruct{
			Foo: 1,
			Bar: "foo",
		}
		accu += gs.Foo
	}
}