Ivan's articles
![Optimizing CSS: ID Selectors and Other Myths](https://uploads.sitepoint.com/wp-content/uploads/2017/11/1510300025optimizing-css-300x194.jpg)
Optimizing CSS: ID Selectors and Other Myths
Ivan Čurić covers the basics of CSS parsing, how to measure CSS selector performance, and how to deal with multiple render passing on dynamic pages.
![JavaScript Performance Optimization Tips: An Overview](https://uploads.sitepoint.com/wp-content/uploads/2017/11/1511317262js-performance-300x195.jpg)
JavaScript Performance Optimization Tips: An Overview
Ivan digs into JavaScript performance, from environments, response times, context, parsing, compiling and executing, to bundle sizes and shipping less code.