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 (
 "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 3.165µs to complete.

By Adam Ng

IF you gain some knowledge or the information here solved your programming problem. Please consider donating to the less fortunate or some charities that you like. Apart from donation, planting trees, volunteering or reducing your carbon footprint will be great too.

Golang : Measure execution time for a function

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

By Adam Ng

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