Python Sampling Profiler: Profile a Running Process Without Restarting It
Python 3.15's built-in sampling profiler (Tachyon) attaches to a running process by PID, no code changes. Hands-on: attach, flamegraph, wall vs CPU vs GIL.
Tutorials
LLM Food Recognition in Production: What Shipping soba Taught Me
How I picked an LLM for food photo recognition in soba: a benchmark, a live A/B that cut scan cost to $0.005, and the prompt work that fixes portion weight.
DuckDB in Python: Query CSV, Parquet, and Pandas with SQL
DuckDB in Python turns SQL into a zero-setup analytics engine: query CSV, Parquet, and Pandas DataFrames in-process, join across sources, and add UDFs.
uv Workspaces: Build a Python Monorepo From Scratch
Build a Python monorepo with uv workspaces: one shared lockfile and virtualenv, cross-package imports, per-package builds, and the gotchas to watch for.
Python Lazy Imports (PEP 810): The Startup Speedup, Benchmarked
Python lazy imports (PEP 810) land in Python 3.15. I benchmarked boto3, requests and pydantic startup: the real speedup, and how to get most of it today.
Go's JSON v2 (encoding/json/v2): Faster, Stricter, and What Breaks
Go's encoding/json/v2 is a reported 2–10x faster at unmarshaling but flips v1 defaults: duplicate keys, nil slices, case matching. How to enable it and migrate.
How to Build an AI Agent in Go (From Scratch, No Framework)
Build an AI agent in Go from scratch: a tool-calling loop against the Anthropic API in ~120 lines, no frameworks, with real code and the gotchas to watch for.
Python 3.15: Lazy Imports, frozendict, and Faster Startup
Python 3.15 lands lazy imports, a frozendict builtin, unpacking in comprehensions, and the Tachyon sampling profiler. Here's what changed and what to test.
Go Generic Methods: A Hands-On Go 1.27 Tutorial
Go 1.27 finally adds generic methods: type parameters on methods at last. A hands-on tutorial on the syntax, the chaining it enables, and the interface catch.
Mistral OCR 4 Tutorial: Build a Document Pipeline in Python
Extract text, tables, and structured JSON from PDFs using Mistral OCR 4 in Python. Bounding boxes, confidence scores, and a complete invoice pipeline.