Note about -XX:+UseSerialGC.

Author: trvrb

README.md

@@ -24,17 +24,19 @@ The program can be compiled with:
 
 Then to run:
 
-	java -Xmx1G Antigen
+	java -XX:+UseSerialGC -Xmx1G Antigen
 
 A transportable jar file can be created with:
 
 	jar cfe antigen.jar Antigen *.class cern/ org/
 
 Then to run from this jar:
 
-	java -jar antigen.jar -Xmx1G Antigen
+	java -jar antigen.jar -XX:+UseSerialGC -Xmx1G Antigen
 
-This requires Java 1.7 to compile and run.
+This requires Java 1.7 to compile and run. The `-Xmx1G` option is used to increase memory allocation. 
+This may need to be increased further with larger host population sizes. The `-XX:+UseSerialGC` option 
+swaps the default Java garbage collector to something that works much more efficiently for Antigen.
 
 ## Parameters
 
@@ -70,4 +72,4 @@ Memory can be easily profiled by calling `jmap -histo <PID>`.
 
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-Copyright Trevor Bedford 2010-2014. Distributed under the GPL v3.
+Copyright Trevor Bedford 2010-2014. Distributed under the GPL v3.