org.apache.log4j.performance
public class: SystemTime [javadoc |
source]
java.lang.Object
org.apache.log4j.performance.SystemTime
Measures the time required to make a System.currentTimeMillis() and
Thread.currentThread().getName() calls.
On an 233Mhz NT machine (JDK 1.1.7B) the
System.currentTimeMillis() call takes under half a microsecond to
complete whereas the Thread.currentThread().getName() call takes
about 4 micro-seconds.
| Field Summary |
|---|
| static int | RUN_LENGTH | |
| Method from org.apache.log4j.performance.SystemTime Detail: |
|---|
 static double currentThreadNameloop() {
long before = System.currentTimeMillis();
for(int i = 0; i < RUN_LENGTH; i++) {
Thread.currentThread().getName();
}
return (System.currentTimeMillis() - before)*1000.0/RUN_LENGTH;
}
|
public static void main(String[] args) {
double t = systemCurrentTimeLoop();
System.out.println("Average System.currentTimeMillis() call took " + t);
t = currentThreadNameloop();
System.out.println("Average Thread.currentThread().getName() call took "
+ t);
} |
static double systemCurrentTimeLoop() {
long before = System.currentTimeMillis();
for(int i = 0; i < RUN_LENGTH; i++) {
System.currentTimeMillis();
}
return (System.currentTimeMillis() - before)*1000.0/RUN_LENGTH;
} |
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