Github user tgravescs commented on the issue:
https://github.com/apache/spark/pull/15556
So this is still reading the entire file, its just filtering out just the
start and end log entries? so basically the listener bus only replays those
events vs all of them.
Have you run this on history files with GBs? I'll give it a try here when
I have a chance and do a further review.
If it a good speedup without having the metadata separate its definitely
good to have an if needed we can always do the separate metadata later.
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