FeatureRequest: "Sort threads by runtime or liveliness"

Many times in a system some threads are created but they are short lived. Allow the user to select the sorting criterion for the threads:
1) First sorting criterion would be thread runtime. If a thread was running for the whole time during the program, it is probably more important than the thread that was running for a few miliseconds
2) Liveliness: if a thread is sleeping most of the time, even if it did run for the whole duration of the program, it is probably not that important. The more consecutive stack samples that are same, the less lively the thread is.