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Notes from week 40

Fast Tessera inference that brings one Xeon node level with a GPU; reverse dependencies in day10; Windows, macOS and FreeBSD worker updates and a new ad hoc pipeline engine.

05 Oct 2026

Marc Elvers

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Notes from week 28

Headline activities have included resolving the scraping attacks, fixing obuilder bugs, and Tessera AMX optimisations.

13 Jul 2026

Marc Elvers

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Tessera v1.1 released, with smoother and temporally stable embeddings

TESSERA v1.1 is a drop-in retrained model that fixes the tiling artefacts of v1.0, with embeddings now being served from AWS S3 and model weights up on Hugging Face.

12 Jun 2026

Anil Madhavapeddy's Blog

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.plan-26-16: Chennai, Cambridge, Belfast: a week on the wing

A week of hops between Chennai, Cambridge and Belfast for the FP Launchpad takeoff at IIT Madras, a surprise Publication of the Year at the Cambridge Ring Hall of Fame, meeting the VC on the upcoming Rokos School of Governance, mirroring half a petabyte of TESSERA tiles and hacking on oi

19 Apr 2026

Anil Madhavapeddy's Blog

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Building a STAC server to avoid scanning 3.8 million tiles

The GeoTessera project produces 128-channel geospatial embeddings from Sentinel satellite imagery. The dataset is tiled at 0.1-degree resolution across the globe, covering 9 years and comprising roughly 3.8 million tiles, each containing embeddings and scale-factor files.

17 Apr 2026

Marc Elvers

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Streaming millions of TESSERA tiles over HTTP with Zarr v3

How we restructured TESSERA's geospatial embeddings from millions of individual numpy files into sharded Zarr v3 stores for efficient HTTP streaming, enabling everything from single-pixel mobile lookups to regional-scale analysis with just a couple of range requests.

14 Mar 2026

Anil Madhavapeddy's Blog

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Optimizing an MP3 Codec with OCaml/OxCaml

Numberphile’s latest video has been released, and in it Ben Sparks introduces the 15 Game.

11 Feb 2026

Marc Elvers

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The 15-Game

Numberphile’s latest video has been released, and in it Ben Sparks introduces the 15 Game.

11 Feb 2026

Marc Elvers

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Tile Server

My throw-away comment at the end of my earlier post shows my scepticism that the JSON file approach was really viable.

02 Dec 2025

Marc Elvers

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