These two have me confused: "TypeScript compile time when changing files takes several minutes, making continuous compiling an excruciatingly slow process" an

These two have me confused: "TypeScript compile time when changing files takes several minutes, making continuous compiling an excruciatingly slow process" and "The internal code and runtime TypeScript declarations must be manually kept in sync since the TypeScript Compiler isn’t helpful to generate the d.ts files" If you're compiling Typescript, the .d.ts files are output by the compiler. The only time you need to manually keep them in sync is when you're writing .js and manually writing the .d.ts.