Greetings From https://github.com/prebid/prebid-server

We use json-patch in our project and observed a performance difference when we upgraded to v5 from an older version. This is a high scale application which is particularly sensitive to memory allocations. I turned the MergePatch example in the readme to a benchmark test and found the following results on the 5.2.0 and 5.1.0 version branches with Go 1.16:

func BenchmarkMergePatch(b *testing.B) {	original := []byte(`{"name": "John", "age": 24, "height": 3.21}`)	target := []byte(`{"name": "Jane", "age": 24}`)	alternative := []byte(`{"name": "Tina", "age": 28, "height": 3.75}`)	patch, err := CreateMergePatch(original, target)	if err != nil {	panic(err)	}	for n := 0; n < b.N; n++ {	MergePatch(alternative, patch)	} } 

v5.2.0 BenchmarkMergePatch-12 85310 14823 ns/op 6454 B/op 154 allocs/op v5.1.0 BenchmarkMergePatch-12 216194 6405 ns/op 2634 B/op 56 allocs/op 

v5.2.0+ is using significantly more memory in terms of bytes and allocations. I am curious if this is a known change or perhaps we need to modify our calls to optimize for lower memory usage?

Thank you.