Adam Johnson

PEP 827 – Type Manipulation | peps.python.org We propose adding powerful type-level introspection and construction facilities to Python’s type system. This design is inspired largely by TypeScript’s conditional and mapped types, but is adapted to...

Very interesting PEP that could unlock a clear way to type Django’s ORM

peps.python.org/pep-0827/

#Django #Python

Thanks, and wow, that is not good!

“The awful biomass” - have you got any deeper link on *how* bad it is?

a kind of boner'd I never thought I'd be

You only live 1+ times

Camberwell done mate

Nice, I always like a good cleanup. I use daisydisk, somehow a pie chart helps my brain more than rectangular areas.

Django: profile memory usage with Memray - Adam Johnson

[Articles] Django: profile memory usage with Memray

Use Memray to profile Django startup, identify heavy imports like numpy, and reduce memory by deferring, lazy importing, or replacing dependencies. #djangonews

adamj.eu/tech/2026/0...

Use this package to split text into characters/words/sentences/lines, or to flexibly translate strings around complex pluralization rules.

The post includes some musings on my “agentic engineering” approach to building the package.

Python: introducing icu4py, bindings to the Unicode ICU library - Adam Johnson I made a new package! Thank you to my client Rippling for inspiring and sponsoring its development.

✍️ New post introducing icu4py: Python bindings to ICU (International Components for Unicode), the official translation and localization library from Unicode.

adamj.eu/tech/2026/02...

#Python #AI #i18n #l10n

Bonne voyage!

Yay, my packages django-htmx and django-rich are now receiving income through Tidelift. Thanks, Tidelift and its subscribers! 🚀

boiled, pan-fried, and grilled

Django: profile memory usage with Memray - Adam Johnson Memory usage can be hard to keep under control in Python projects. The language doesn’t make it explicit where memory is allocated, module imports can have signficant costs, and it’s all too easy to c...

✍️ New post on using Memray to profile the memory usage of a Django project.

You can use this tool to find and eliminate memory-costly lines of code. The example in the post finds and removes a costly import, reducing startup time.

adamj.eu/tech/2026/01...

#Django #Python

Yay, they covered tprof! 🎯

A carton of four “Giga” apples (tagline: “mighty good”)

A packet of ~60 giga bites

Python: introducing tprof, a targeting profiler - Adam Johnson Profilers measure the performance of a whole program to identify where most of the time is spent. But once you’ve found a target function, re-profiling the whole program to see if your changes helped ...

✍️ New post introducing tprof, a new targeting profiler for Python 3.12+ that measures only specified functions.

Use tprof to measure the impact of a few functions without adding overhead to the whole program.

adamj.eu/tech/2026/01...

#Python

You got this!! 💪

There’s probably a bunch of low-hanging fruit sitting around on various code paths like this…

Fixed #36858 -- Optimized `Field._get_default()` for `db_default` case. by adamchainz · Pull Request #20526 · django/django Trac ticket number ticket-36858 Branch description Create and share a single instance of DatabaseDefault instead of making a new one each time the lambda is called. The quick benchmark on the ticke...

Made a nice optimization for Model.objects.bulk_create() with fields using db_default, ~12% in one quick benchmark:

github.com/django/djang...

#Django

Oxford spelling! Confuse everyone! en.wikipedia.org/wiki/Oxford_...

Django Quiz 2025 - Adam Johnson Last month, I held another quiz at the December edition of Django London. The December quiz is an annual tradition at our meetup, a way of making this final event of the year more relaxed and giving a...

✍️ New post with last month’s quiz from Django London!

Test your Django knowledge with these 12 questions, or just skim the answers and learn something new.

adamj.eu/tech/2026/01...

#Django

Thinking again about this 2023 post that sketches out how Twitter could feasibly run on a single big-ass server

thume.ca/2023/01/02/o...

Zero todos is death.

I followed this post long ago and haven't touched it since: jvns.ca/blog/2017/12...

I'd probably use another service these days, like Buttondown, or rolling my own with AWS SES or whatever. Haven't researched the space in a while.

Blog! Blog! Blog!

For banging pizza in London go to Japes and get “London style”

japes.uk/styles-of-pi...

#London #Pizza

My wife recommended checking out this account, maybe you’ve seen her

www.instagram.com/drchelsey_pa...

Sending Christmas love, man ❤️💚

Optimize `ObjectId` by adamchainz · Pull Request #2656 · mongodb/mongo-python-driver Changes in this PR From profiles of a mongoengine-using project, I’ve noticed that ObjectId creation happens a lot, around ~0.5% of total request time. This PR optimizes the class in two ways: It...

📐 I just used @anthonypjshaw.bsky.social 's sweet-as richbench project for the first time, to validate a small optimization. Will definitely be using it again in the future!

github.com/mongodb/mong...