Nicole Sullivan

Nicole Sullivan
Architect, Stubbornella

Website | @stubbornella

Nicole is an evangelist, front-end performance consultant, CSS Ninja, and author. She started the Object-Oriented CSS open source project, which answers the question: how do you scale CSS for millions of visitors or thousands of pages? She also consulted with the W3C for their beta redesign, and is the co-creator of, an image optimization service in the cloud. She is passionate about CSS, web standards, and scalable front-end architecture for large commercial websites.

She co-authored Even Faster Websites and blogs at


Office Hours Exhibit Hall (Office Hours D)
Nicole Sullivan (Stubbornella)
Architect, Stubbornella Read more.
Web Performance Mission City B4
Nicole Sullivan (Stubbornella)
Average rating: ****.
(4.09, 11 ratings)
Paul Irish said there a four primary concerns for CSS Performance: selector matching, style recalculation, reflows, and repaints. All of those are impacted by the efficiency of your CSS. In this session, Nicole will detail the tools every UI engineering team needs to figure out when and why their CSS has become slow. Read more.


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