resolved
issue
A recent change to the way module imports are handled by the platform has resulted in the "Most recent duration (ms)" in the "Actions" tab of model showing import durations that can be far lower than the actual durations.
workaround
Process durations are precise, so in order to see the accurate duration of an action, a process can be made containing only the single action. When this process is run, it will show the action duration accurately.