Hello, For commons-monitoring my first intent was to use System.nanotime() to compute code performances. A simple bench [1] demonstrates that System.currentTimeMillis is FAR quicker to return current time (on my windows box [2]) :
nanoseconds precision may be usefull for profilers, but is it for monitoring purpose ? [1] 10000000 time (System.nanoTime() ) vs (System.currentTimeMillis()) : D:\projets\apache\trunks-sandbox\monitoring\target>java -server -cp .\test-classes org.apache.commons.monitoring.bench.CurrentTimeMillisVsNanoTime nanotime took : 4683052742ns currentTimeMillis took : 26907938ns [2] D:\projets\apache\trunks-sandbox\monitoring\target>java -version java version "1.6.0" Java(TM) SE Runtime Environment (build 1.6.0-b105) BEA JRockit(R) (build R27.2.0-131-78843-1.6.0-20070320-1457-windows-ia32, compiled mode)
