FastLogger simply log logStr.

Logger Type.

Initialize a FastLogger without attaching timestamp a tuple of logger and clean up action are returned. This type signature should be read as:

newFastLogger :: LogType -> IO (FastLogger, IO ())

This logger uses numCapabilities many buffers, and thus does not provide time-ordered output. For time-ordered output, use newFastLogger1.

Like newFastLogger, but creating a logger that uses only 1 internal builder. This scales less on multi-core machines and consumes more memory because of an internal queue but provides time-ordered output.

bracket version of newFastLogger

TimedFastLogger pass FormattedTime to callback and simply log its result. this can be used to customize how to log timestamp.

Usually, one would write a wrapper on top of TimedFastLogger, for example:

{-# LANGUAGE OverloadedStrings #-}

log :: TimedFastLogger -> LogStr -> IO ()
log logger msg = logger (\time -> toLogStr (show time) <> " " <> msg <> "\n")

Initialize a FastLogger with timestamp attached to each message. a tuple of logger and clean up action are returned.

bracket version of newTimeFastLogger

Log message builder. Use (<>) to append two LogStr in O(1).

Types that can be converted to a LogStr. Instances for types from the text library use a UTF-8 encoding. Instances for numerical types use a decimal encoding.

Converting LogStr to ByteString.

Obtaining the length of LogStr.

The type for buffer size of each core.

The default buffer size (4,096 bytes).