Measure execution time
yourbasic.org/golang
Measure a piece of code
start := time.Now()
// Code to measure
duration := time.Since(start)
// Formatted string, such as "2h3m0.5s" or "4.503μs"
fmt.Println(duration)
// Nanoseconds as int64
fmt.Println(duration.Nanoseconds())
Measure a function call
You can track the execution time of a complete function call with this one-liner, which logs the result to the standard error stream.
func foo() {
defer duration(track("foo"))
// Code to measure
}
func track(msg string) (string, time.Time) {
return msg, time.Now()
}
func duration(msg string, start time.Time) {
log.Printf("%v: %v\n", msg, time.Since(start))
}
Benchmarks
The testing
package has support for
benchmarking that can be used to examine the performance of your code.