[web-devel] Caching the System time
mxcantor at gmail.com
Wed Aug 10 06:20:03 CEST 2011
Just curious, but might it be faster to:
replace the MVar handle with an IORef [Data.Sequence.Seq String]
logs are appended with atomicModifyIORef
then every n seconds, a worker thread uses atomicModifyIORef to clear the sequence and write the log messages to a handle?
this way, logging a message doesn't require taking an mvar
I have no idea if this is better, just thought i'd throw it out.
On Aug 10, 2011, at 11:17 AM, Kazu Yamamoto (山本和彦) wrote:
> Every user-thread of Mighttpd records a log message with Handle.
> Since Handle is protected with MVar, serialization is done. Multiple
> log messages are buffered in the buffer of Handle to reduce the
> number of the write system call. Moreover, I re-implemented hPut to
> reduce unnecessary intermediate data to compose a log message.
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