I haven't found any large scale analyses but here's an example of a simple type annotation halving compilation time: https://stackoverflow.com/questions/3662427

I haven't found any large scale analyses but here's an example of a simple type annotation halving compilation time: https://stackoverflow.com/questions/36624273/investigating-long-typescript-compile-times https://stackoverflow.com/questions/36624273/investigating-l... The Typescript compiler performance wiki might also be of interest: https://github.com/microsoft/TypeScript/wiki/Performance https://github.com/microsoft/TypeScript/wiki/Performance