Jenkins core supplies a column "Last Duration" for "List view".

Unfortunately, this actually shows the duration of the last successful build, without a clear indication of this.

There is a report of this for the Jenkins core:
https://issues.jenkins.io/browse/JENKINS-9145
According to the comments there, it doesn't look, like this will be changed.
Another way to solve the problem, would be a column via extra-columns-plugin, supplying this type. (I just don't have a good name for the column right away "real last completed duration" ???