small test to check memory benefit of String substring change in Java 1.7.0_06

gistfile1.scala

#!/bin/sh
exec scala -deprecation -nocompdaemon "$0" "$@"
!#

def usedMemoryInMo() = {
  val rt= java.lang.Runtime.getRuntime
  (rt.totalMemory - rt.freeMemory)/1024/1024
}

println(util.Properties.javaVersion)

val substrings = for(i <- 1 to 10000) yield {
   val str="0123456789"*1024 // le motif répété 1024 fois
   str.substring(str.size/2, str.size/2+10)
}
System.gc
Thread.sleep(1000)
println(usedMemoryInMo+"Mo")