In statistical objects In MXMetricPayload histogrammedTimeToFirstDrawKey start times not equal applicationExitMetrics exit： case1: "applicationExitMetrics": { "backgroundExitData": { "cumulativeNormalAppExitCount": 3, "cumulativeMemoryPressureExitCount": 4 }, "foregroundExitData": { "cumulativeMemoryResourceLimitExitCount": 3 } }, "applicationLaunchMetrics": { "histogrammedTimeToFirstDrawKey": { "histogramNumBuckets": 14, "histogramValue": { "10": { "bucketCount": 1, "bucketStart": "1740 ms", "bucketEnd": "1749 ms" }, "2": { "bucketCount": 1, "bucketStart": "1440 ms", "bucketEnd": "1449 ms" }, "3": { "bucketCount": 2, "bucketStart": "1490 ms", "bucketEnd": "1499 ms" }, "11": { "bucketCount": 1, "bucketStart": "1780 ms", "bucketEnd": "1789 ms" }, "4": { "bucketCount": 1, "bucketStart": "1500 ms", "bucketEnd": "1509 ms" }, "5": { "bucketCount": 1, "bucketStart": "1580 ms", "bucketEnd": "1589 ms" }, "12": { "bucketCount": 1, "bucketStart": "1860 ms", "bucketEnd": "1869 ms" }, "6": { "bucketCount": 1, "bucketStart": "1620 ms", "bucketEnd": "1629 ms" }, "13": { "bucketCount": 1, "bucketStart": "1990 ms", "bucketEnd": "1999 ms" }, "7": { "bucketCount": 1, "bucketStart": "1650 ms", "bucketEnd": "1659 ms" }, "0": { "bucketCount": 1, "bucketStart": "1400 ms", "bucketEnd": "1409 ms" }, "8": { "bucketCount": 1, "bucketStart": "1660 ms", "bucketEnd": "1669 ms" }, "1": { "bucketCount": 1, "bucketStart": "1430 ms", "bucketEnd": "1439 ms" }, "9": { "bucketCount": 1, "bucketStart": "1730 ms", "bucketEnd": "1739 ms" } } }, In this Case the app cold started 15 times, but quit only 10 times， why？？ case2: "applicationExitMetrics": { "backgroundExitData": { "cumulativeMemoryPressureExitCount": 1 }, "foregroundExitData": { "cumulativeMemoryResourceLimitExitCount": 3, "cumulativeNormalAppExitCount": 1 } }, "applicationLaunchMetrics": { "histogrammedTimeToFirstDrawKey": { "histogramNumBuckets": 3, "histogramValue": { "0": { "bucketCount": 1, "bucketStart": "1490 ms", "bucketEnd": "1499 ms" }, "1": { "bucketCount": 1, "bucketStart": "1680 ms", "bucketEnd": "1689 ms" }, "2": { "bucketCount": 1, "bucketStart": "1880 ms", "bucketEnd": "1889 ms" } } }, The app cold started 3 times, but quit unexpectedly reached 5 times， why？？？