No, even small files. You must have issues with your setup. Are you sure your compiler is not built in debug mode?
$ nim -v
Nim Compiler Version 1.6.6 [MacOSX: arm64]
Compiled at 2022-05-05
Copyright (c) 2006-2021 by Andreas Rumpf
active boot switches: -d:release -d:nimUseLinenoise