Hello I am Ian Duffy
Senior Software Engineer who strives to build performant websites.
Tips for making the Performance Panel less overwhelming
Posted On: Web Performance Calendar28 December 2025Time to Brand Identity
1 October 20259 mins readBuilding a Slider using CSS Scroll Snap with React
15 July 202512 mins readSnippets to Help Debug Web Performance Issues
28 June 20254 mins readWeb Performance - Prioritising User Experience ahead of Search Rankings
2 April 20258 mins readUsing Chrome New Performance Panel Landing Page In Dev Tools
14 February 202511 mins readLooking how browsers choose the right image to load with srcset, dpr, and sizes
4 February 20256 mins readCreating a theme switcher using View Transition
12 January 20254 mins readCreating a Image Light Box using Web Components
18 November 20243 mins readCommon performance issue when using functions to get initial state for React Use State
3 October 20245 mins readHandling Layout shift with img and picture tag
12 July 20244 mins readBuilding Mobile Menu with the Popover API
15 May 20245 mins readFirst Month of using Github Copilot
22 November 20235 mins readHighlighting current section in the content bar
13 March 20234 mins readWrite better buttons with CSS Variables
8 March 20233 mins read
Tips for making the Performance Panel less overwhelming
Posted On: Web Performance Calendar28 December 2025Time to Brand Identity
1 October 20259 mins readSnippets to Help Debug Web Performance Issues
28 June 20254 mins readWeb Performance - Prioritising User Experience ahead of Search Rankings
2 April 20258 mins readUsing Chrome New Performance Panel Landing Page In Dev Tools
14 February 202511 mins readLooking how browsers choose the right image to load with srcset, dpr, and sizes
4 February 20256 mins readCommon performance issue when using functions to get initial state for React Use State
3 October 20245 mins readHandling Layout shift with img and picture tag
12 July 20244 mins read
Building a Slider using CSS Scroll Snap with React
15 July 202512 mins readCreating a theme switcher using View Transition
12 January 20254 mins readCreating a Image Light Box using Web Components
18 November 20243 mins readCommon performance issue when using functions to get initial state for React Use State
3 October 20245 mins read
Skills
This is a list of the technologies and skills I often use and have experience with:
- WEB PERFORMANCE.
- HTML.
- CSS.
- JAVASCRIPT.
- REACT.
- NEXTJS.
- JQUERY.
- SCSS.
- RUBY ON RAILS.
- NODEJS.
- TYPESCRIPT.
- RESPONSIVE DESIGN.
- ACCESSIBILITY.
- CYPRESS.
- RSPEC.
- ASTRO.
- TEST DRIVEN DEVELOPMENT.