W0024 - Slow Function

Error

-module(main).
foo() -> sets:new().
%%       ^^^^^^^^^^ 💡 warning: Prefer the map-based sets implementation.
%%                |The old implementation of sets was very slow. Use `[{version, 2}]` when constructing a set.
%%                |
%%                |See https://www.erlang.org/doc/man/sets.html
%%                |

Explanation

Some functions are known to be slow. Provide a warning if any of them are used. In particular, it warns about.

• sets:new/0
• sets:from_list/0
• dict:*. i.e. any usage from the dict module.

If it is unavoidable to use one of these functions, you can preceed the function call with a special comment to silent the linter:

% elp:ignore W0024 - An optional explanation here