[Haskell-cafe] Ann: Win32-notify 0.1
david.maciver at gmail.com
Sun Apr 20 12:24:48 EDT 2008
On Sun, Apr 20, 2008 at 5:22 PM, Bryan O'Sullivan <bos at serpentine.com> wrote:
> Niklas Broberg wrote:
> > So API suggestions would be most welcome!
> Your challenge will lie in finding an API that can be implemented
> efficiently on all concerned platforms. I don't know what the
> characteristics of the Windows or OS X notification APIs are, but if you
> use inotify on Linux, and you immediately issue a read every time select
> tells you there's something to be read, you'll easily consume 70% of a
> CPU when the filesystem gets busy.
> With a little guile, you can reduce that overhead by two orders of
> magnitude, to a fraction of a percent. It's not all that easy to do
> this well, but using inotify naively is so crippling that you must do
> it. Any higher-level API must account for factors like this.
Factor has a file system notification API that wraps windows, linux
and mac ones. It might be worth taking a look at that to see what it
More information about the Haskell-Cafe