How read from ETL file and analyze data

Im working to build automation performance testing in python (also can do it in .net ). I'm using windows performance recorder to collect my cpu and memory data , at the end of the recording it create a ETL file , but the problem is that i don't know how read and analyze the file from my code , I tried to convert csv , but the data is no good after the converting and the file size of the csv file is to big. Im looking for tool that I can read his data files from my code and its collect data from my computer every millisec. Maybe someone have an idea for a solution ?