Jairus' Blog

Writing about tooling, software design, performance, and whatever I learn the hard way.

Build Logs

Short write-ups on what shipped, what broke, and what changed in the code.

Opinions on docs, testing, release workflows, and pragmatic engineering tradeoffs.

Background on the packages I maintain and the decisions behind them.

A compact SWAR trick for detecting quotes, backslashes, control characters, and non-ASCII UTF-16 lanes while serializing JSON strings.

A practical guide to setting up tests in AssemblyScript, using snapshots, mocking, fuzzing, and running against real runtimes with as-test.

Parsing JSON unicode escape sequences with SWAR instead of branches or lookup tables.

How to add practical property-based fuzzing to an AssemblyScript project with as-test.