Thinking About Slowly Degrading Page Performance

Ritesh Maheshwari talks about how LinkedIn deals with performance regressions:

Looking at the chart above, where the dotted red line is a reference point to show where we started the year, notice how site speed improvements tend to be significant and noticeable, as they are optimization-driven. Degradations, however, can generally be of any “amount,” as they happen for various reasons. LinkedIn’s page-serving pipeline has many moving parts. We deploy code multiple times per day, operate a micro-service architecture with hundreds of services, and infrastructure upgrades are frequent. A slowdown in any of these components can cause degradations.

While large degradations can be caught using A/B testingcanary analysis, or anomaly detection, small ones tend to leak to production. Thus, performance of a page has a tendency to always degrade over time.

This led to having the centralized Performance Team focus on identifying these leaks, called “site speed regressions,” and to craft tools and processes to fix them.

It’s an interesting principle.  I could see this principle work for tracking database performance degradation as well.

Related Posts

Choosing Clustered Index Columns

Ed Elliott wades into the clustered index debate: I have seen this debated in forums spread over the internet for decades, and the advice that we gave ten years ago isn’t as valid today as it was then. Ten years ago, memory was considerably less, and disks were spinning rust. The advent of SSD’s and […]

Read More

Event-Driven Microservices

Saeed Barghi gives us an overview of what event-driven microservices are: Modern Microservices are all about making systems event-driven: instead of making remote requests and waiting for the response (services and components calling each other and tell each other what to do), we can send notifications to related microservices when an event occurs. These events […]

Read More

Categories

November 2017
MTWTFSS
« Oct Dec »
 12345
6789101112
13141516171819
20212223242526
27282930