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Loading images progressively [Jose Perez] and Open Space

It's performance meetup time again! We will continue to focus on images. Last time we saw that images affect page loading performance and how to use the picture element to provide the most suitable image depending on browser.

Jose Perez will talk about some different techniques used in well known websites to load images with a performance mindset. He will explain different ways to do lazy loading of images and transitions from placeholders to the final image. Besides, he will explain what has worked and what hasn't applying them to Spotify's website.

About Jose

Jose is a web developer at Spotify working on their most trafficked websites and Spotify's web player. Before that he developed a deep interest on web performance optimization while working in a Spanish social network building their mobile site, supporting all kind of devices from portable video consoles (Nintendo DS, Nintendo DSi, PlayStation Portable) to TVs. He tweets at @jmperezperez.

Host this time is Expressen and we will be at Kungsvalvet. 

Jose will start 18:00 and the doors open at 17:30. After we will have Open Space (prepare topics you wanna talk about!) and have time to get to know each other :)

/PA, Tobias, Peter & Henrik

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  • Peter H.

    Sorry I couldn't make it, both me and my daughter was sick. Looked through the slides and it looked awesome. Will your next presentation be streamed/recorded of this talk José?

    11 de noviembre

    • José M. P.

      I should have done a screen recording yesterday to share it here but I failed to remember. As far as I know the next presentation will be recorded, so I'll add a link here when it's available.

      11 de noviembre

  • Isi R.

    Good presentation and good chat later. Really warm atmosphere. And good pizza too!

    2 · 11 de noviembre

  • Peter H.

    And thank you Henrik for taking care of everything!

    11 de noviembre

  • José M. P.

    Thanks for the attending the meetup! And for hose who couldn't make it, don't worry! You can find the slides from the presentation at

    7 · 10 de noviembre

  • Henrik T.

    Thx to everyone attending this time and a special thanks to Jose for a great presentation. We weren't that many but we were proud and brave and I think we had a good time together! Hope you enjoyed it and may the weather be with us next time.

    4 · 10 de noviembre

  • Mattias P.

    Great talk and meetup, thanks everyone!

    2 · 10 de noviembre

  • Patricio R.

    I couldn't make due to transportation issues. Please let me know if the event is gonna be uploaded somewhere afterwards.

    10 de noviembre

  • Aleksandr M.

    How to get in, guys?

    10 de noviembre

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