Improving front page performance: removing images, 5 ways
Improving front page performance: removing images, 5 ways We regularly hold Fix-Its at Khan Academy, where we take a day to work on the little things that pile up, the bugs and tweaks and optimizations we don't find the time to do otherwise. On Tuesday, we had a Fix-It dedicated entirely to performance, and we made a Trello board of performance improvement ideas, many of them around speeding up ou
A Guide to Writing Backbone Apps at Coursera
Preamble: At Coursera, we made the choice to use the Backbone MVC framework for our frontends, and over the past year, we've evolved a set of best practices for how we use Backbone. I wrote a guide for internal use that documents those best practices (much of it based on shorter blog posts here), and I've snapshotted it here on my blog to benefit other engineering teams using Backbone and to give
Improving Backbone App Performance
At CSSConf and JSConf, one of the big themes was performance. I saw talks from Chrome engineers on Jank-busting, a talk from Adobe engineer Peter Flynn on performance tuning in Brackets, and had a lengthy lunch discussion about API performance and caching. Eventually, I couldn't stand all that talking with no action, and I broke down and spent my night in the bar investigating a part of Coursera t
Server-side HTML vs. JS Widgets vs. Single-Page Web Apps
Server-side HTML vs. JS Widgets vs. Single-Page Web Apps At the recent GOTO Chicago conference, I gave a talk on "Frontend Architectures: from the prehistoric to the Post-modern." In just my first 10 months at Coursera, I've experienced the joys and woes of many different frontend architectures, and I wanted to share what I learnt. I detail everything in the slides, but I'll summarize my thoughts
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