Rails列挙型：文字列または整数列？

私は現在、列挙のための適切なRailsの宝石を探しています。

私はすでに試した

• enum_simulator

• has_enum

  1. Both use a string column in the database to store the enum data. Wouldn't an integer column have a better performance or less storage consumption (using MySQL)?
  2. Is there a gem out there that can already do this?

どうもありがとう！

Update: I found the simple_enum gem which uses integer values to represent the enum within the database. It supports rails 3.1 and is well maintained.

• simple_enum