Basics
This check is disabled by default.
Learn how to enable it via .credo.exs.
This check has a base priority of normal and works with any version of Elixir.
Explanation
Enum.reduce/3 that builds a string via <> concatenation is O(n²).
# bad
Enum.reduce(list, "", fn item, acc -> acc <> item end)
Enum.reduce(list, "", fn item, acc -> acc <> to_string(item) end)
# good
Enum.join(list)
Enum.map_join(list, &to_string/1)Check-Specific Parameters
There are no specific parameters for this check.
General Parameters
Like with all checks, general params can be applied.
Parameters can be configured via the .credo.exs config file.