3d data parsing and visualization

[reverse]

1. my logs contain transactions
2. each transaction has page_id , action_id and time_taken
3. there are over 300 pages with each page having 3 actions

I want to show only those results (pages\action combo) for which daily average processing time (time_taken) has worsen the most... let's say by 10 % ... or to make it simple ... top 10 worst performing results (pages\action combo) since the start of time range and today
for example - for last 30 days time range in datepicker- comparison of today and -30 days ans so on.
this is really complex...