7 posts
So at first, it looked like about 10% of the BuySellAds scripts were being blocked. But after replacing how we were tracking the blocks with an internal service (just a little Redis counter), it was showing more like 28% of scripts being blocked.
A rather clever way of looking at performance data by breaking it down into histogram "regions".
I like Harry's categorization for performance testing:
I try to distill the types of testing that we do into three distinct categories: Proactive, Reactive, and Passive.
I've been using "Active" and "Passive" myself and found that it really helps companies better understand why having both synthetic and RUM monitoring in place is important. I really like the way Harry breaks that "Active" category out further based on whether the tests are run proactively or reactively.
Clever stuff from Nolan about trying to measure the complete cost of a component—not just the JS execution.
Harry's been doing a lot of digging into third-party performance in his performance work and he was kind enough to share his process with the rest of us. Lots of good ideas here!