DuckDB python
Inside Polars’ Streaming Engine: How Spillable Sinks Handle Larger-Than-RAM Joins
If you search polars streaming engine spill today, the top result is a benchmark that OOM’d on Polars 1.6.0 in September 2024.
Inside Polars’ Lazy Query Engine: How Predicate Pushdown Beats Pandas
The pola.rs blog has a headline number that every Polars tutorial copies: the optimized lazy plan runs roughly 4x faster than the naive one on the NYC.
Inside CPython Sub-Interpreters: How Immortal Objects Share Memory Without the GIL
The technical barrier that kept Python’s sub-interpreter feature from being genuinely useful for a decade wasn’t parallelism — it was reference counting.
Inside CPython’s obmalloc: How the Small Object Allocator Avoids the System Heap
Jump to: What exactly does obmalloc manage, and what falls through to system malloc? · How are arenas, pools, and blocks structured inside CPython?
Django 5.2 async ORM aprefetch_related() Hit N+1 With select_related
Event date: April 1, 2026 — django 5.2 Jump to Why does aprefetch_related() still fire N+1 queries under the async ORM?
Free-Threaded Python 3.13t: Measuring Contention With perf c2c
The first time you run a threaded dict.get loop on python3.13t and watch it scale at 1.3x on 8 cores instead of 7x, the instinct is to blame Python.
Litestar Cut Our P99 Latency 40% After Migrating From FastAPI
In this article Why does Litestar handle tail latency better than FastAPI? What makes serialization the biggest bottleneck?
Ruff 0.8 Replaced Black, isort, and Flake8 in Our Monorepo
A single ruff check –fix and ruff format pair now covers what used to be three separate pre-commit hooks: Black for formatting, isort for import.
Ruff 0.6 Replaced Black and isort in Our Monorepo Last Week
The switch took one afternoon and one follow-up PR. A 180-package Python monorepo that had been running black , isort , and flake8 on every pre-commit.
Python JIT: practical notes from production
The experimental copy-and-patch JIT landed in CPython 3.13 behind the –enable-experimental-jit build flag, and by 3.14 it is stable enough to enable on.