How to know elapsed time of a Jenkins Job - jenkins

Question

I have a Jenkins job in which at the end of the job (maybe around post actions or in the last stage of that job I want to find how much time has been elapsed since the job started.
How can find that? Is there any easy straightforward way of knowing it ?

Answer 1

Sample pipeline script
pipeline {
agent any
stages {
stage('Hello') {
steps {
echo 'Hello World'
sleep 10
}
}
}
post {
always {
println "${currentBuild.durationString}"
}
}
}
Output:
[Pipeline] {
[Pipeline] stage
[Pipeline] { (Hello)
[Pipeline] echo
Hello World
[Pipeline] sleep
Sleeping for 10 sec
[Pipeline] }
[Pipeline] // stage
[Pipeline] stage
[Pipeline] { (Declarative: Post Actions)
[Pipeline] echo
14 sec and counting
[Pipeline] }
[Pipeline] // stage
[Pipeline] }
[Pipeline] // node
[Pipeline] End of Pipeline
Finished: SUCCESS
if you don't like the and counting part you can always do
"${currentBuild.durationString}".replaceAll(' and counting', "")

Answer 2

Install Timestamper plugin.
The Timestamper plugin adds timestamps to the console output of Jenkins jobs. For example:
21:51:15 Started by user anonymous
21:51:15 Building on master
21:51:17 Finished: SUCCESS
/timestamps/ By default, display the elapsed time in seconds with three places after the decimal point.
/timestamps/?time=HH:mm:ss&appendLog Display the system clock time and append the line from the log.
/timestamps/?elapsed=HH:mm:ss.S&appendLog Display the elapsed time and append the line from the log.
/timestamps/?time=HH:mm:ss&elapsed=HH:mm:ss.S Display both the system clock time and the elapsed time.
/timestamps/?currentTime&time=HH:mm:ss Display the current time on the Jenkins controller.

Answer 3

Apart from all the answers above there is a very nice way of doing it:
import hudson.Util
.
.
.
String time = Util.getTimeSpanString(System.currentTimeMillis() - currentBuild.startTimeInMillis)
If you display time it will come in this format:
2 hr 15 min 47 sec
which is pretty neat and does not require any extra variable to be setup initially, also less editing needed (in my case I wanted in this exact way).