Briefing on CPU profiling

Let's perform some example profiling on a simple Go program in order to understand how the profiler works. We will create a sample program with a couple of sleep parameters in order to see the timings for different function calls:

1. First, we instantiate our package and add all of our imports:

import (
    "fmt"
    "io"
    "net/http"
    _ "net/http/pprof"
    "time"
)

2. Next, in our main function, we have an HTTP handler that has two sleep functions that are called as part of the handler:

func main() {
    Handler := func(w http.ResponseWriter, req *http.Request) {
        sleep(5)
        sleep(10)
        io.WriteString(w, "Memory Management Test")
    }
    http.HandleFunc("/", Handler)
    http.ListenAndServe(":1234", nil)
}

Our sleep function just sleeps for a particular millisecond...