When digging around in enriched Network Telemetry data, you'll find yourself noticing a bump, or a trough in any of the displayed time series and think to yourself: 

"Hmmm... is that peak an anomaly, or did it behave the same last day|week|... at the same time?"

Ask yourself no more, "Compare over previous period" is here!

In a nutshell, this new Data Explorer feature lets you look at the same time range you are currently looking at, but in the past, and help you visualize variations between each of your query result's time series within the same time range in the past.

This feature comes with a streamlined redesign of the Time Range query panel in Data Explorer.

Hitting the Compare over previous period switch will unveil options to be able to compare the current time range, to the same one at a configurable time in the past, such as: "this hour with the same hour yesterday, or a week ago..."

Upon selecting this option, your data-table will now include two new tabs:

• A Previous Period tab showing you the TopN time-series for the same time range in the past
• A Comparison Summary tab, outlining in an sortable fashion such useful insights such as: 
  • previous current rank for the time series vs previous rank,  
  • rank variation for the time series
  • and the percentage of change (sortable) in the selected metrics between Previous and Current periods

From any of these 3 tabs, you will then be able to select any time series and look at a combined line chart displaying both the current and previous period for the selected time series.

Switching between Current Period and Previous Period will display the full set of time series for either periods - always leveraging the same convention:

• Plain Line:        Current Period
• Dashed Line:   Previous Period

Now go ahead, play around with the feature and let us know what you think of it.
As always, you'll always find in Kentik Product Management a friendly ear to suggest improvements to this feature (and any other for that matter), do let us know!