What is the most performant way to get info from the triggering record

[paullynun]

Hi.

How info from the triggering record can be obtain to do some math while insuring the fastest performance?

I have a workflow that triggers when a Task record change status to completed. This workflow runs a Task action to call a Project action. This last one will update the remaining time on the project base on a time estimate set on the Project minus the time estimate for the task.