开源软件名称（OpenSource Name）：

开源软件地址(OpenSource Url)：

开源编程语言(OpenSource Language)：

开源软件介绍(OpenSource Introduction)：

Efficient, versatile logging tools for Haskell.

fast-logger

low-level and extremely fast logging tools. All Haskell logging tools that log to a Handle or generate formatted dates should depend on these.

wai-logger

add logging to your webapp. fast Apache style logger

date-cache & wai-logger-prefork

Obsoleted.

Please see package documentation of individual packages for more details, e.g: http://hackage.haskell.org/package/fast-logger