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