Find slowest loading / longest time to generate pages
The Performance Logging and Monitoring module was split out from the Devel module last summer, but is mostly the same.

The summary logging page is sortable by all of the table columns.  For example, if you want to show the slowest pages first, you just need to click on the "MS (MAX)" column heading until it sorts descending.  The direct URL would be at /admin/reports/performance-logging/summary?sort=desc&amp;order=ms+%28Max%29

You can also do a manual query on the database if that is where you are storing results:

SELECT *
FROM {performance_summary} performance_summary
ORDER BY ms_max DESC