Golang : Measure execution time for a function

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 (

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



 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>`


 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 3.165µs to complete.

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

By Adam Ng

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