Beyond Words: The impact of images in web performance
Exploring the impact of images and how browsers select the right image
I'm a Frontend Engineer with over 10 years of experience, constantly learning and improving.
Currently, I work at Decathlon, where I dedicate part of my time to improve the web performance. I'm passionate about building efficient and high-quality web applications.
Images play a crucial role in the web experience, grabbing attention, telling stories and enriching user experiences.
However, not every image is ideal for a website. The right (or wrong) images can affect the planet, how much data your users spend, and how fast your site loads.
We’ll explore some of the key factors that influence how browsers pick and display images:
📱 Srcset & sizes — giving the browser options for all devices
🔍 High-res screens (DPR) — making sure images look sharp
🚀 Loading behavior — how the browser prioritizes, lazy loads, or preloads images to speed things up
- Date:
- 2025 June 21 - 13:00
- Duration:
- 45 min
- Room:
- Sala Benalmádena
- Conference:
- OpenSouthCode 2025
- Language:
- English
- Track:
- Difficulty:
- Easy
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