My log file is a windows log file that has 2 fields, TIME and Message. In our logs we log messages from a device during a process from start to finish. I want to caliberate the time taken from start to finish. The start command is in the message text and the finish command is in the message text. How can I find the two commands from the message for a give Device Serial number and find the diff (finish - start) to know the duration of the process?
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