var s String
    s +="hello" 

Loop count: 10000 times

Allocation: 3305 times

Took: 26.481084ms

    var s strings.Builder
    s.WriteString("hello") 

Loop count: 10000 times

Allocation: 20 times

Took: 432.959µs

Compare: 61.2 times faster than normal concat

    var s bytes.Buffer
    s.WriteString("hello") 

Loop count: 10000 times

Allocation: 11 times

Took: 460.25µs

Compare: 0.94 times slower than strings.Builder

Test machine :Go: 1.18, Macbook pro 14, Arch: ARM-64, MacOS: 12.3,