https://gernberg.com/posts/ Recent content in Blog on Gustav Ernberg von Heijne https://gernberg.com/Gustav-Ernberg-von-Heijne-640.jpg https://gernberg.com/Gustav-Ernberg-von-Heijne-640.jpg Hugo en-us Sat, 26 Sep 2026 07:06:00 +0200 https://gernberg.com/posts/2025/rectangle-delivery-how-hard-can-it-be/ Mon, 05 May 2025 20:01:11 +0000 https://gustav.ernberg.se/?p=529 A fast-paced talk from performance.sync() on how display ads are delivered online, the performance challenges the ad industry faces, and data and case studies. https://gernberg.com/posts/2019/fast-ads-matter/ Tue, 29 Oct 2019 20:16:40 +0000 https://gernberg.com/posts/2019/fast-ads-matter/ Slow ads don’t just frustrate users—they hurt your bottom line. Every second of delay reduces impressions, viewability, and user retention. Here is a clear framework to help you diagnose ad speed bottlenecks and deliver faster, more profitable ad experiences. https://gernberg.com/2018/10/visualizing-favourite-focal-lengths/ Mon, 22 Oct 2018 13:58:00 +0000 https://gustav.ernberg.se/?p=318 Choosing a prime lens by data: a short Python script using Pillow that reads EXIF data from my photos and charts which focal lengths I actually use. https://gernberg.com/2018/05/raksmorgas/ Mon, 21 May 2018 21:23:00 +0000 https://gustav.ernberg.se/?p=259 Two filenames that look identical but aren’t: how Unicode normalization (NFC vs NFD) of å, ä and ö caused mysterious 404s, and how to spot it. https://gernberg.com/2015/02/why-you-should-not-use-the-onedrive-shorten-url-feature-right-now/ Tue, 03 Feb 2015 20:57:28 +0000 http://gustav.ernberg.se/?p=19 OneDrive’s URL shortener served links over plain HTTP, breaking the encrypted chain and exposing shared Office 365 documents. Here is why that matters. https://gernberg.com/2014/11/relaunching-the-blog/ Mon, 24 Nov 2014 22:55:18 +0000 http://gustav.ernberg.se/?p=5 The blog has moved to a new server and been wiped clean, making room for a fresh start with consistent English-language posts.