go - How to measure both before and after byte size and time to compress -

i want gzip string (it json response)

var b bytes.buffer gz := gzip.newwriter(&b) if _, err := gz.write([]byte("yourdatahere")); err != nil {     panic(err) } 

how can output size of bytes before , after compression , more importantly how can time takes compress , decompress string?

you can calculate size per nipun talukdar's comment.

len([]byte("yourdatahere")) b.len()

and use time.now() , time.since() time taken.

var b bytes.buffer input := []byte("yourdatahere")  fmt.println("input size : ", len(input))  gz := gzip.newwriter(&b)   start := time.now()   gz.write(input) if _, err := gz.flush(); err != nil {         panic(err) }   totaltime := time.since(start)   fmt.println("compressed size : ", b.len(), "\ntime taken : ", totaltime) gz.close() 

same method can applied unzipping. can create support function can timing.

func timer(starttime time.time) {  totaltime := time.since(starttime) log.println("time taken : ",totaltime)  } 

usage : defer timer(time.now()) @ start of function.