doc: update instructions

kidoman · Oct 13, 2013 · 54fa44a · 54fa44a
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diff --git a/javarays/README.md b/javarays/README.md
@@ -7,5 +7,5 @@
 ## Usage
 
     $ javac javarays/Raycaster.java
-    $ time java javarays.Raycaster > javarays.ppm
+    $ java -server -Xms4096m -Xmx8192m -XX:+AggressiveOpts -XX:+UseCompressedOops -noverify javarays.Raycaster
     $ open javarays.ppm
diff --git a/nimrays/README.md b/nimrays/README.md
@@ -6,6 +6,6 @@
 
 ## Usage
 
-    $ nimrod -d:release  --threads:on --threadAnalysis:off -t:-ffast-math -t:-funroll-loops c main.nim
+    $ nimrod -d:release --threads:on --threadAnalysis:off -t:-ffast-math -t:-funroll-loops -t:-mtune=native -t:-march=native c main.nim
     $ main
     $ open render.ppm
diff --git a/rubyrays/README.md b/rubyrays/README.md
@@ -10,10 +10,12 @@ implentation that does support real threading.
 ## Prerequisites
 
   * Ruby 1.9+
+  * JRuby 1.7.5
 
 ## Usage
 
     $ ruby rubyrays.rb
+    $ jruby -J-server -J-Xms4096m -J-Xmx8192m -J-XX:+AggressiveOpts rubyrays.rb
     $ open render.ppm
 
 There are three optional arguments: `width`, `height`, and `threads`.