Comparison (struct vs kvatbog's vector which uses slices)

main_test.go

package main

import (
	"testing"

	"github.com/kvartborg/vector"
)

// kvartborg/vector version
type vec = vector.Vector

func BenchmarkVector(bench *testing.B) {
	a := vec{10, 20}
	b := vec{20, 30}

	for i := 0; i < bench.N; i++ {
		c := a.Add(b)
		_ = c
	}
}

// slice version!
type Vec2f struct {
	X, Y float64
}

func (v Vec2f) Add(o Vec2f) Vec2f {
	return Vec2f{v.X + o.X, v.Y + o.Y}
}

func BenchmarkVec2f(bench *testing.B) {
	a := Vec2f{10, 20}
	b := Vec2f{20, 30}

	for i := 0; i < bench.N; i++ {
		c := a.Add(b)
		_ = c
	}
}

result.txt

goos: linux
goarch: amd64
pkg: test.com/m
cpu: Intel(R) Core(TM) i7-10750H CPU @ 2.60GHz
BenchmarkVector-12    	78154443	        14.82 ns/op	      16 B/op	       1 allocs/op
BenchmarkVec2f-12     	1000000000	         0.2362 ns/op	       0 B/op	       0 allocs/op