Graph data with start time and end time?

[cnandreu]

Example data:
[{startTime: 15, endTime: 25, operation: 'login'}, {startTime: 5, endTime: 10, operation: 'logout'}]

I couldn't find a way to do something like:
execTime = endTime - startTime
and then show average execTime per operation.

For example (shown as a table):
login: 10
logout: 5

Any pointers? is this even possible with kibana?

[rashidkpc]

This is not currently possible in Kibana, however it could be done as a script field, which is slated for Kibana 4 beta 3: #1537