private void initValues(final long[] lengths, final StructuredArray<MockStructure> array) {
final long[] cursors = new long[lengths.length];
final long totalElementCount = array.getTotalElementCount();
long elementCountToCursor = 0;
while (elementCountToCursor < totalElementCount) {
// Check element at cursors:
MockStructure mockStructure = array.get(cursors);
long indexSum = 0;
for (long index : cursors) {
indexSum += index;
}
mockStructure.setIndex(indexSum);
mockStructure.setTestValue(indexSum * 2);
// Increment cursors from inner-most dimension out:
for (int cursorDimension = cursors.length - 1; cursorDimension >= 0; cursorDimension--) {
if ((++cursors[cursorDimension]) < lengths[cursorDimension]) break;
// This dimension wrapped. Reset to zero and continue to one dimension higher
cursors[cursorDimension] = 0;
}
elementCountToCursor++;
}
}
long loopSumTest() {
long sum = 0;
for (int i = 0; i < array.getLength(); i++) {
sum += array.get(i).getTestValue();
}
return sum;
}
private void assertCorrectFixedInitialisation(
final long expectedIndex,
final long expectedValue,
final long[] lengths,
final StructuredArray<MockStructure> array) {
for (int i = 0; i < lengths.length; i++) {
assertThat(valueOf(array.getLengths()[i]), is(valueOf(lengths[i])));
}
assertTrue(array.getElementClass() == MockStructure.class);
final long[] cursors = new long[lengths.length];
final long totalElementCount = array.getTotalElementCount();
long elementCountToCursor = 0;
while (elementCountToCursor < totalElementCount) {
// Check element at cursors:
MockStructure mockStructure = array.get(cursors);
assertThat(valueOf(mockStructure.getIndex()), is(valueOf(expectedIndex)));
assertThat(valueOf(mockStructure.getTestValue()), is(valueOf(expectedValue)));
// Increment cursors from inner-most dimension out:
for (int cursorDimension = cursors.length - 1; cursorDimension >= 0; cursorDimension--) {
if ((++cursors[cursorDimension]) < lengths[cursorDimension]) break;
// This dimension wrapped. Reset to zero and continue to one dimension higher
cursors[cursorDimension] = 0;
}
elementCountToCursor++;
}
}
@Test
public void testLoopingSpeeds() throws NoSuchMethodException {
final int length = 10000000;
final CtorAndArgsProvider<MockStructure> ctorAndArgsProvider =
new DefaultMockCtorAndArgsProvider();
array = StructuredArray.newInstance(ctorAndArgsProvider, length);
encapsulatedArray = new EncapsulatedArray(length);
for (int i = 0; i < 5; i++) {
long startTime1 = System.nanoTime();
long sum1 = loopSumTest();
long endTime1 = System.nanoTime();
double loopsPerSec1 = 1000 * (double) length / (endTime1 - startTime1);
long startTime2 = System.nanoTime();
long sum2 = loopEncapsulatedArraySumTest();
long endTime2 = System.nanoTime();
double loopsPerSec2 = 1000 * (double) length / (endTime2 - startTime2);
System.out.println(
"sum1 = "
+ sum1
+ " ("
+ loopsPerSec1
+ "M), sum2 = "
+ sum2
+ " ("
+ loopsPerSec2
+ "M)");
}
}
