### Question:
SizeOf { public Size deepSizeOf(int maxDepth, boolean abortWhenMaxDepthExceeded, Object... obj) { try { return new Size(walker.walk(maxDepth, abortWhenMaxDepthExceeded, obj), true); } catch (MaxDepthExceededException e) { LOG.warn(e.getMessage()); return new Size(e.getMeasuredSize(), false); } } SizeOf(SizeOfFilter fieldFilter, boolean caching); long sizeOf(Object obj); Size deepSizeOf(int maxDepth, boolean abortWhenMaxDepthExceeded, Object... obj);  }### Answer:
@Test public void testOnHeapConsumption() throws Exception { SizeOf sizeOf = new CrossCheckingSizeOf(); int size = 80000; for (int j = 0; j < 5; j++) { container = new Object[size]; long usedBefore = measureMemoryUse(); for (int i = 0; i < size; i++) { container[i] = new EvilPair(new Object(), new SomeClass(i % 2 == 0)); } long mem = 0; for (Object s : container) { mem += deepSizeOf(sizeOf, s); } long used = measureMemoryUse() - usedBefore; float percentage = 1 - (mem / (float) used); System.err.println("Run # " + (j + 1) + ": Deviation of " + (int)(percentage * -100) + "%\n" + used + " bytes are actually being used, while we believe " + mem + " are"); if (j > 1) { assertThat("Run # " + (j + 1) + ": Deviation of " + (int)(percentage * -100) + "% was above the +/-1.5% delta threshold \n" + used + " bytes are actually being used, while we believe " + mem + " are (" + (used - mem) / size + ")", Math.abs(percentage) < .015f, is(true)); } } }