Android 在Firebase查询开始执行之前，有很多垃圾收集器调用

我发现Firebase在某些查询上执行得很慢，即使是在一小部分数据上。 我将Log Level设置为Logger.Level.DEBUG，以查看是否可以在Log cat中找到一些信息。 在这里，在日志猫中，我发现在firebase查询开始之前有很多垃圾收集器调用

W/art: Suspending all threads took: 119.246ms W/art: Suspending all threads took: 15.993ms I/art: Background partial concurrent mark sweep GC freed 178740(5MB) AllocSpace objects, 6(1210KB) LOS objects, 20% free, 61MB/77MB, paused 20.261ms total 246.362ms I/art: Background sticky concurrent mark sweep GC freed 421369(15MB) AllocSpace objects, 1(30KB) LOS objects, 11% free, 63MB/71MB, paused 3.699ms total 150.208ms W/art: Suspending all threads took: 38.838ms I/art: Background sticky concurrent mark sweep GC freed 234760(8MB) AllocSpace objects, 0(0B) LOS objects, 11% free, 63MB/71MB, paused 3.761ms total 124.938ms I/art: Background sticky concurrent mark sweep GC freed 177455(6MB) AllocSpace objects, 0(0B) LOS objects, 8% free, 65MB/71MB, paused 4.031ms total 109.770ms I/art: Background sticky concurrent mark sweep GC freed 165051(6MB) AllocSpace objects, 0(0B) LOS objects, 7% free, 65MB/71MB, paused 3.902ms total 105.397ms W/art: Suspending all threads took: 19.577ms W/art: Suspending all threads took: 30.319ms I/art: Background sticky concurrent mark sweep GC freed 133737(5MB) AllocSpace objects, 0(0B) LOS objects, 6% free, 66MB/71MB, paused 34.150ms total 116.078ms W/art: Suspending all threads took: 58.275ms W/art: Suspending all threads took: 31.344ms I/art: Background partial concurrent mark sweep GC freed 239886(8MB) AllocSpace objects, 12(391KB) LOS objects, 19% free, 65MB/81MB, paused 4.279ms total 308.630ms W/art: Suspending all threads took: 19.896ms W/art: Suspending all threads took: 17.442ms I/art: Background sticky concurrent mark sweep GC freed 413361(15MB) AllocSpace objects, 0(0B) LOS objects, 10% free, 67MB/75MB, paused 21.411ms total 169.188ms I/art: Background sticky concurrent mark sweep GC freed 230648(8MB) AllocSpace objects, 0(0B) LOS objects, 10% free, 67MB/75MB, paused 4.088ms total 127.504ms I/art: Background sticky concurrent mark sweep GC freed 214282(8MB) AllocSpace objects, 0(0B) LOS objects, 9% free, 68MB/75MB, paused 3.783ms total 121.986ms W/art: Suspending all threads took: 8.059ms W/art: Suspending all threads took: 8.102ms W/art: Suspending all threads took: 25.963ms I/art: Background sticky concurrent mark sweep GC freed 160942(6MB) AllocSpace objects, 0(0B) LOS objects, 7% free, 69MB/75MB, paused 33.338ms total 135.224ms I/art: Background sticky concurrent mark sweep GC freed 158679(5MB) AllocSpace objects, 0(0B) LOS objects, 7% free, 69MB/75MB, paused 4.614ms total 119.459ms I/art: Background sticky concurrent mark sweep GC freed 149782(5MB) AllocSpace objects, 0(0B) LOS objects, 6% free, 70MB/75MB, paused 3.840ms total 100.132ms W/art: Suspending all threads took: 59.880ms I/art: Background sticky concurrent mark sweep GC freed 86107(3MB) AllocSpace objects, 9(221KB) LOS objects, 2% free, 73MB/75MB, paused 5.562ms total 66.501ms W/art: Suspending all threads took: 16.000ms I/art: Background sticky concurrent mark sweep GC freed 68706(2MB) AllocSpace objects, 8(204KB) LOS objects, 2% free, 73MB/75MB, paused 5.063ms total 68.463ms I/art: Background sticky concurrent mark sweep GC freed 66336(2MB) AllocSpace objects, 10(242KB) LOS objects, 1% free, 73MB/75MB, paused 5.038ms total 69.289ms I/art: Background sticky concurrent mark sweep GC freed 60331(2MB) AllocSpace objects, 7(177KB) LOS objects, 1% free, 74MB/75MB, paused 5.181ms total 54.786ms W/art: Suspending all threads took: 27.598ms I/art: Background sticky concurrent mark sweep GC freed 64552(2MB) AllocSpace objects, 7(155KB) LOS objects, 1% free, 74MB/75MB, paused 17.137ms total 81.332ms I/art: Background sticky concurrent mark sweep GC freed 48948(1803KB) AllocSpace objects, 7(158KB) LOS objects, 1% free, 74MB/75MB, paused 6.488ms total 63.935ms I/art: Background sticky concurrent mark sweep GC freed 46732(1694KB) AllocSpace objects, 3(59KB) LOS objects, 1% free, 74MB/75MB, paused 6.090ms total 62.455ms I/art: Background sticky concurrent mark sweep GC freed 39782(1456KB) AllocSpace objects, 2(46KB) LOS objects, 1% free, 74MB/75MB, paused 5.956ms total 63.859ms I/art: Background partial concurrent mark sweep GC freed 339007(11MB) AllocSpace objects, 119(3MB) LOS objects, 18% free, 70MB/86MB, paused 4.144ms total 287.479ms I/art: Background sticky concurrent mark sweep GC freed 481371(17MB) AllocSpace objects, 83(2MB) LOS objects, 10% free, 71MB/79MB, paused 3.836ms total 136.776ms I/art: Background sticky concurrent mark sweep GC freed 306454(10MB) AllocSpace objects, 52(1234KB) LOS objects, 10% free, 70MB/78MB, paused 5.471ms total 103.283ms I/art: Background sticky concurrent mark sweep GC freed 186051(7MB) AllocSpace objects, 142(3MB) LOS objects, 10% free, 69MB/77MB, paused 4.630ms total 112.830ms I/art: WaitForGcToComplete blocked for 45.513ms for cause HeapTrim W/art: Suspending all threads took: 45.069ms I/art: Background sticky concurrent mark sweep GC freed 214400(7MB) AllocSpace objects, 31(749KB) LOS objects, 7% free, 70MB/76MB, paused 3.877ms total 105.103ms D/Connection: conn_1 - Sending 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W8PxyIuVGta61mBe5JzdqLS7+Zg=, HzHQx4oxAirWHzbx5Atg3YsgdvU=, Swu1s+1wuaIPJTG67S W/art：暂停所有线程所需时间：119.246ms W/art：暂停所有线程所需时间：15.993ms I/art：背景部分并发标记扫描GC释放178740（5MB）AllocSpace对象，6（1210KB）LOS对象，20%空闲，61MB/77MB，暂停20.261ms总计246.362ms I/art：背景粘性并发标记扫描GC释放421369（15MB）AllocSpace对象，1（30KB）LOS对象，11%空闲，63MB/71MB，暂停3.699ms总计150.208ms W/art：暂停所有线程所需时间：38.838ms I/art：背景粘性并发标记扫描GC释放234760（8MB）AllocSpace对象，0（0B）LOS对象，11%空闲，63MB/71MB，暂停3.761ms总计124.938ms I/art：背景粘性并发标记扫描GC释放177455（6MB）AllocSpace对象，0（0B）LOS对象，8%空闲，65MB/71MB，暂停4.031ms总计109.770ms I/art：背景粘性并发标记扫描GC释放165051（6MB）AllocSpace对象，0（0B）LOS对象，7%空闲，65MB/71MB，暂停3.902ms总计105.397ms W/art：暂停所有线程所需时间：19.577ms W/art：暂停所有线程所需时间：30.319ms I/art：背景粘性并发标记扫描GC释放133737（5MB）AllocSpace对象，0（0B）LOS对象，6%空闲，66MB/71MB，暂停34.150ms总计116.078ms W/art：暂停所有线程所需时间：58.275ms W/art：暂停所有螺纹所需时间：31.344ms I/art：背景部分并发标记扫描GC释放239886（8MB）AllocSpace对象，12（391KB）LOS对象，19%空闲，65MB/81MB，暂停4.279ms总计308.630ms W/art：暂停所有线程所需时间：19.896ms W/art：暂停所有线程所需时间：17.442ms I/art：背景粘性并发标记扫描GC释放413361（15MB）AllocSpace对象，0（0B）LOS对象，10%空闲，67MB/75MB，暂停21.411ms总计169.188ms I/art：背景粘性并发标记扫描GC释放230648（8MB）AllocSpace对象，0（0B）LOS对象，10%空闲，67MB/75MB，暂停4.088ms总计127.504ms I/art：背景粘性并发标记扫描GC释放214282（8MB）AllocSpace对象，0（0B）LOS对象，9%空闲，68MB/75MB，暂停3.783ms总计121.986ms W/art：暂停所有线程所需时间：8.059ms W/art：暂停所有线程所用时间：8.102ms W/art：暂停所有线程所需时间：25.963ms I/art：背景粘性并发标记扫描GC释放160942（6MB）AllocSpace对象，0（0B）LOS对象，7%空闲，69MB/75MB，暂停33.338ms总计135.224ms I/art：背景粘性并发标记扫描GC释放158679（5MB）AllocSpace对象，0（0B）LOS对象，7%空闲，69MB/75MB，暂停4.614ms总计119.459ms I/art：背景粘性并发标记扫描GC释放149782（5MB）AllocSpace对象，0（0B）LOS对象，6%空闲，70MB/75MB，暂停3.840ms总计100.132ms W/art：暂停所有线程所需时间：59.880ms I/art：背景粘性并发标记扫描GC释放86107（3MB）AllocSpace对象，9（221KB）LOS对象，2%空闲，73MB/75MB，暂停5.562ms总计66.501ms W/art：暂停所有线程所需时间：16.000ms I/art：背景粘性并发标记扫描GC释放68706（2MB）AllocSpace对象，8（204KB）LOS对象，2%空闲，73MB/75MB，暂停5.063ms总计68.463ms I/art：背景粘性并发标记扫描GC释放66336（2MB）AllocSpace对象，10（242KB）LOS对象，1%空闲，73MB/75MB，暂停5.038ms总计69.289ms I/art：背景粘性并发标记扫描GC释放60331（2MB）AllocSpace对象，7（177KB）LOS对象，1%空闲，74MB/75MB，暂停5.181ms总计54.786ms W/art：暂停所有线程所需时间：27.598ms I/art：背景粘性并发标记扫描GC释放64552（2MB）AllocSpace对象，7（155KB）LOS对象，1%空闲，74MB/75MB，暂停17.137ms总计81.332ms I/art：背景粘性并发标记扫描GC释放48948（1803KB）AllocSpace对象，7（158KB）LOS对象，1%空闲，74MB/75MB，暂停6.488ms总计63.935ms I/art：背景粘性并发标记扫描GC释放46732（1694KB）AllocSpace对象，3（59KB）LOS对象，1%空闲，74MB/75MB，暂停6.090ms总计62.455ms I/art：背景粘性并发标记扫描GC释放39782（1456KB）AllocSpace对象，2（46KB）LOS对象，1%空闲，74MB/75MB，暂停5.956ms总计63.859ms I/art：背景部分并发标记扫描GC释放339007（11MB）AllocSpace对象，119（3MB）LOS对象，18%空闲，70MB/86MB，暂停4.144ms总计287.479ms I/art：背景粘性并发标记扫描GC释放481371（17MB）AllocSpace对象，83（2MB）LOS对象，10%空闲，71MB/79MB，暂停3.836ms总计136.776ms I/art：背景粘性并发标记扫描GC释放306454（10MB）AllocSpace对象，52（1234KB）LOS对象，10%空闲，70MB/78MB，暂停5.471ms总计103.283ms I/art：背景粘性并发标记扫描GC释放186051（7MB）AllocSpace对象，142（3MB）LOS对象，10%空闲，69MB/77MB，暂停4.630ms总计112.830ms I/art:WaitForgCTOMPLETE因原因HeapTrim被阻止45.513ms W/art：暂停所有线程所需时间：45.069ms I/art：背景粘性并发标记扫描GC释放214400（7MB）AllocSpace对象，31（749KB）LOS对象，7%空闲，70MB/76MB，暂停3.877ms总计105.103ms 连接：conn_1-发送数据：{D={a=q，r=2，b={h=bHJ1mWrKhIU9GTHaIkUYeaP43Bo=，p=/，ch={hs=6/TP6/TP6/TP6/TP3是一家公司的数据。这些公司的数据是一家公司的数据。这些公司的数据是一家公司的数据。他们的数据是一家公司的数据。他们的数据是一家公司的数据是一家公司的数据。他们的数据是一家公司的数据是一家公司的数据。他们的数据是一家公司的数据。他们的数据是一家公司。他们的数据是一家公司。他们的数据是一家公司。他们的数据是一家公司。他们的数据是一家公司。他们的数据是一家公司。他们的数据是一家公司。他们的数据是一家公司。他们的数据是一家公司。他们的数据是一家公司。他们的数据是一家公司。他们的数据是他们的公司。他们的数据是他们的公司。他们的数据。他们的数据是。他们的数据是他们的数据是他们的数据。他们的数据是。他们的数据是他们的数据。他们的数据是。他们的数据是FZ/g=，tC0zEvCLJljHSpbfgGWIZIcYdLo=，bcOAzAwkWR8yUVLYEdTpiNXxvxE=，rbaiPzhMDh7ahB1aSsJ8cf63MZg=，IUDU7S7GA0tL3UGjxmI45ofEX24=，NzdrheN8DXqBUfY+RM3L3q7hG4Q=，ekjUn4lnbwdGwje6+cNES2VKJxE=，fI1b1+/CRsQIMT3mt/i50nbQ8Y8=，E9