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
- OpenSouthKids
- Start Time:
- 2025 June 21 10:00
- Room:
- Sala Málaga
- Crafting snaps quickstart guide 101
- Start Time:
- 2025 June 21 12:00
- Room:
- Sala Frigiliana - 20
- Introducción a Micro:bit para niños
- Start Time:
- 2025 June 21 12:00
- Room:
- Sala Benamargosa 21
- Visualizing IoT telemetry with open-source tools
- Start Time:
- 2025 June 21 13:00
- Room:
- Sala Fuengirola
- Effortless observability for Flask/Django/FastAPI/Go/ExpressJS/Spring Boot
- Start Time:
- 2025 June 21 13:00
- Room:
- Sala Sierra de Yeguas
- OpenPrinting - We make printing just work!
- Start Time:
- 2025 June 21 13:00
- Room:
- Sala Canillas