Performance issues found in community 4.92 to 5.01

[mhockett]

I recently upgraded from 4.29.2 to 5.0.1
We are seeing increase in time spent processing changesets and even in some cases executing the sql in both oracle and postgres.
I noticed that stripComments is not working, unless the log is just printing out the whole changeset and not what is parsed. I also noticed more time ( up to 3 milliseconds more) between ChangelogParserFactory and the updateNullChecksums , specifically in the FormattedSqlChangelogParser. That may not sound like much but for large enterprise builds it adds up. Our nightly build went from 40 minutes to over 2 hours. I have had to revert back to 4.29.2.
Any suggestions, and is this a known issue?
thanks for you help