Jonathan Klein

Jonathan Klein
Director of Engineering , Attend

Website | @jonathanklein | Attendee Directory Profile

Jonathan is a software engineer at Etsy, where he focuses on solving web performance and scalability challenges. Prior to working at Etsy he spent almost four years at Wayfair, where he led the team that converted the primary tech stack to PHP/Lighttpd/FreeBSD. He started and organizes the Boston Web Performance Meetup Group, and he contributes to a few open source projects, including the HTTPArchive and CSSLint. Jonathan blogs regularly at and can be found on Twitter at @jonathanklein.


Web Performance, Grand Ballroom West
Jonathan Klein (Attend)
Average rating: ****.
(4.17, 12 ratings)
Synthetic performance monitoring is a key piece of our monitoring toolkit, since it provides stable data over time and more in-depth information than you can get from RUM. Everyone loves WebPagetest, but the public instance isn’t great for high volume testing and trending over time. We’ll explain how Etsy uses a private instance to fill this need, and share the code that drives our tests. Read more.


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