Top 5 TypeScript Performance Tips | HackerNoon

Hi everyone! Today I want to talk about fast TS compilation. There are a lot of tips and tricks about TypeScript code style. But not about compiler performance. - tsconfig typescript

1. Type Annotations

Type Annotations, such as parameters, variables and return types help the compiler to work faster. Named types are more compact than anonymous ones. They decrease the amount of work compiler needs to read and write declaration files.import { baz, BazType } from "baz"; export function foo: BazType { return baz; }type for some of them.

Interfaces are single flat object types that detects conflicts between properties. Relationships between interfaces are also cached. Every added part of interface is checked against target interface before checking against the result interface. That's why interfaces are faster!interface Foo extends Bar, Baz { prop: string; }Every passed argument must be compared to every union value. Especially with big unions.

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