package org.slf4j.impl;
import junit.framework.TestCase;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.slf4j.helpers.BogoPerf;
public class PerfTest extends TestCase {
static long REFERENCE_BIPS = 9000;
public PerfTest(String name) {
super(name);
}
protected void setUp() throws Exception {
super.setUp();
}
protected void tearDown() throws Exception {
super.tearDown();
}
public void testBug72() {
int LEN = 1000*1000*10;
debugLoop(LEN); // warm up
double avg = debugLoop(LEN);
long referencePerf = 93;
BogoPerf.assertDuration(avg, referencePerf, REFERENCE_BIPS);
// when the code is guarded by a logger.isLoggable condition,
// duration is about 16 *micro*seconds for 1000 iterations
// when it is not guarded the figure is 90 milliseconds,
// i.e a ration of 1 to 5000
}
double debugLoop(int len) {
Logger logger = LoggerFactory.getLogger(PerfTest.class);
long start = System.currentTimeMillis();
for (int i = 0; i < len; i++) {
logger.debug("hello");
}
long end = System.currentTimeMillis();
long duration = end - start;
return duration;
}
}