.tip

Apr 6, 2026 · one of the small things

Before TypeScript 7, find out who uses the compiler API

The Go port runs tsc ten times faster, and it won't ship a programmatic API until 7.1. So the entire migration risk is the list of tools that import typescript as a library instead of running it as a command.

pnpm why typescript

Codegen scripts, custom transformers and type-aware lint rules stay on 6 until 7.1. For everything else it's a version bump.

typescripttooling

Longer version: the post this came from.

~/tips/today — 2026-10-19

~cat tips/today

Never build an index on a live table without CONCURRENTLY

postgresqlmigrations

A plain CREATE INDEX takes a lock that blocks every write to the table for the whole build. On a big table that means minutes of outage that look like a hung app.

CREATE INDEX CONCURRENTLY orders_customer_idx ON orders (customer_id);

It's slower and can't run inside a transaction, so you'll have to tell your migration tool. If it fails halfway, it leaves an invalid index behind, so check pg_index.indisvalid and drop it before you retry.

↵ open y yesterday l ls /tips

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