Profiling and optimizing Go web applications
Go has a powerful built-in profiler that supports CPU, memory, goroutine and block (contention) profiling.
Enabling the profiler #
Go provides a low-level profiling API runtime/pprof, but if you are developing a long-running service, it's more convenient to work with a high-level net/http/pprof package.
All you need to enable the profiler is to import net/http/pprof and it will automatically register the required HTTP handlers:
package main
import (
"net/http"
_ "net/http/pprof"
)
func hiHandler(w http.ResponseWriter, r *http.Request) {
w.Write([]byte("hi"))
}
func main() {
http.HandleFunc("/", hiHandler)
http.ListenAndServe(":8080", nil)
}