Perf improvements: Use default os setting for socket recv buffer size

+ This commit 8e38589efb (diff-8c54fc2d40ad45803c6889efbb0192bbR278) introduce a default fixed size read buffer which is too low for most modern system. Thus it induce a lot of unecessary syscall and cpu usage.
  Use the default OS settings in order to let the user control it with
  ie: /proc/sys/net/ipv4/tcp_rmem


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src/Types.hs

@@ -4,6 +4,7 @@
 
 module Types where
 
+
 import           ClassyPrelude
 import           Data.Maybe
 import           System.IO (stdin, stdout)
@@ -25,7 +26,7 @@ deriving instance Hashable PortNumber
 deriving instance Generic N.SockAddr
 deriving instance Hashable N.SockAddr
 
-
+{-# NOINLINE defaultRecvBufferSize #-}   
 defaultRecvBufferSize ::  Int
 defaultRecvBufferSize = unsafeDupablePerformIO $
   bracket (N.socket N.AF_INET N.Stream 0) N.close (\sock -> N.getSocketOption  sock N.RecvBuffer)