X-Git-Url: http://gitweb.michael.orlitzky.com/?a=blobdiff_plain;f=hath.cabal;h=8eb569f410238a9c8ab9aed7c632f5e41e353d32;hb=72645e4a98e9d14eac3220c00058efe2d8fae489;hp=e6f53955df5171fc884c5f847d921f11e1ba2164;hpb=fe04fa7a5572f7bf46dacb960d82da3f2a2c44cf;p=hath.git

diff --git a/hath.cabal b/hath.cabal
index e6f5395..8eb569f 100644
--- a/hath.cabal
+++ b/hath.cabal
@@ -93,6 +93,19 @@ description:
   198.41.0.6: rs.internic.net.
   198.41.0.7:
   @
+  .
+  The DNS lookups are usually the bottleneck for this mode, but we can
+  perform them in parallel. Simply pass the number of threads to the
+  GHC runtime on the command line; for example, the following will
+  perform 25 lookups in parallel:
+  .
+  @
+  hath reversed +RTS -N25 <<< \"198.41.0.4\/24\"
+  198.41.0.4: a.root-servers.net.
+  198.41.0.5:
+  198.41.0.6: rs.internic.net.
+  ...
+  @
 
 executable hath
   build-depends: