Abacn commented on PR #24633:
URL: https://github.com/apache/beam/pull/24633#issuecomment-1347656194

   without a reshuffle before write, `write_runtime Value: 540`
   added a reshuffle before write, `write_runtime Value: 385`
   
   apparently python SyntheticResource is also a time consuming step (#19221). 
To get an accurate write run time metrics need a reshuffle before MeasureTime 
transform


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