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Posts tagged with "Build Performance"

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TypeScript
January 22, 2026

TypeScript 5.x to 7.0: What Breaks and What It Buys

TypeScript 7.0 is a native Go port of the compiler, and Microsoft measured type-checking the VS Code codebase falling from 125.7 seconds to 10.6 seconds at default settings. A team still on 5.8 is two majors behind, so this is the staged route through 6.0, the changed defaults and removals that actually break builds, and who should wait for the 7.1 API.

TypeScript
TypeScript 7
Migration
Developer Experience
Build Performance
By Falak Mahmood
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