It's usually faster than Python for numeric stuff, and has a similar speed for strings. See for example https://benchmarksgame-team.pages.debian.net/benchmarksgame/...

But if you run the code inside the default IDE call DrRacket, you must go to the menu Language>Choose_Language... then click "Show_Details" and disable "Debugging".

With debugging enabled, you get nicer error messages, but it blocks a lot of optimizations and the program get slow.