https://notes.ojochogwu.dev/Short pieces on building systems end to end: the decisions, and the small details that would otherwise become someone’s pain point.enhttps://notes.ojochogwu.dev/low-emission-code/https://notes.ojochogwu.dev/low-emission-code/Wed, 04 Nov 2026 00:00:00 GMTThe home page of this site weighs 60 KB. The median page on the web is about forty times that. Here is why I keep mine small.https://notes.ojochogwu.dev/code-and-health/https://notes.ojochogwu.dev/code-and-health/Wed, 04 Nov 2026 00:00:00 GMTA lot of the power behind software in Nigeria comes from generators a few metres from where people live. That changes what efficiency means.https://notes.ojochogwu.dev/sustainable-data-centres/https://notes.ojochogwu.dev/sustainable-data-centres/Wed, 04 Nov 2026 00:00:00 GMTData centres use about 1.5% of the world's electricity, and the share is growing. Most of what makes one efficient is ordinary, and some of it is decided by the people writing the software.https://notes.ojochogwu.dev/software-and-devices/https://notes.ojochogwu.dev/software-and-devices/Wed, 04 Nov 2026 00:00:00 GMTMost of a phone's carbon is spent before you switch it on. When software pushes a working phone into a drawer, that cost gets paid again, and the old one has to go somewhere.