On Monday, 10 September 2012 at 19:44:10 UTC, Sönke Ludwig wrote:

There were two or three places where memory was leaking. The
current
master now uses malloc/free for almost all per-request
allocations
instead of the GC. Memory usage on Windows now stayed
absolutely
constant for 1.000.000 requests on my machine (about 10 MB
virtual and
4,7 MB ram).

and top says 51k virtual on Linux x64 for the benchmark app...

I can confirm that it's fixed as well, it now shows some pretty
impressive results, which outperform haskell's webserver(which
they claim is the fastest!)