Nicole Sullivan

Nicole Sullivan
Architect, Stubbornella

Website | @stubbornella

Nicole is a front-end performance consultant, CSS aficionado, 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 many companies including Facebook, Salesforce, the W3C, Adobe, Paypal, Trulia and Box. She is the co-creator of, an image optimization service in the cloud, and CSS Lint (, a tool that helps correct common CSS errors before they are pushed to production. She is passionate about CSS, web standards, and scalable front-end architecture for large commercial websites.
She co-authored The Web Performance Daybook, Vol 2 and Even Faster Websites and blogs at


Web Performance, Mission City Ballroom B1
Nicole Sullivan (Stubbornella)
Average rating: ****.
(4.09, 11 ratings)
CSS is a simple declarative language. Preprocessors were introduced to overcome it’s many limitations. Developers have long awaited this functionality, and the use of CSS preprocessors like SASS, Less, and Stylus has become ubiquitous on big websites. Yet CSS preprocessors often output some downright ugly code. During this talk, you will learn about preprocessor performance best practices. Read more.


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