@Test
@Ignore("Intended for use during development only")
public void shouldBeFasterThanSynchronizedMap() throws Exception {
Map<Integer, WeakReference<String>> synchronizedMap =
Collections.synchronizedMap(new WeakHashMap<Integer, WeakReference<String>>());
StopWatch mapTime =
timeMultiThreaded(
"SynchronizedMap",
synchronizedMap,
new ValueFactory<WeakReference<String>>() {
@Override
public WeakReference<String> newValue(int v) {
return new WeakReference<String>(String.valueOf(v));
}
});
System.out.println(mapTime.prettyPrint());
this.map.setDisableTestHooks(true);
StopWatch cacheTime =
timeMultiThreaded(
"WeakConcurrentCache",
this.map,
new ValueFactory<String>() {
@Override
public String newValue(int v) {
return String.valueOf(v);
}
});
System.out.println(cacheTime.prettyPrint());
// We should be at least 4 time faster
assertThat(cacheTime.getTotalTimeSeconds(), is(lessThan(mapTime.getTotalTimeSeconds() / 4.0)));
}
