Golang : Measure execution time for a function



Tags : golang measure-function-time execution-time footer

Ok, this is another way to measure execution time of a Golang function. This method uses defer and produce a footer to be included at the bottom of a web page. Nothing special, just another way.

Here you go!


 package main

 import (
 "net/http"
 "time"
 )

 func measureExecutionTime(startTime time.Time, w http.ResponseWriter, functionName string) {
 timeTaken := time.Since(startTime)
 footer := functionName + " took " + timeTaken.String() + " to complete. "

 w.Write([]byte(footer))

 }

 func SayHelloWorld(w http.ResponseWriter, r *http.Request) {

 // measure our function execution time
 // and put the result at the footer
 defer measureExecutionTime(time.Now(), w, "SayHelloWorld")

 html := `<!DOCTYPE html><html><body>Hello World<br><br></body></html>`

 w.Write([]byte(html))
 }

 func main() {
 mux := http.NewServeMux()
 mux.HandleFunc("/", SayHelloWorld)

 http.ListenAndServe(":8080", mux)
 }

Run the code above and point your browser to http://localhost:8080 and you should see this output(example):

Hello World

SayHelloWorld took 3.165┬Ás to complete.

  See also : Golang : Measure http.Get() execution time



Tags : golang measure-function-time execution-time footer

By Adam Ng

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