Hi, I’m trying to use snapshots to optimize my game, but I’m facing an issue. I use the removeSelf method to clear those snapshots but it seems that it’s not enough. The system memory is growing bigger and bigger each time I reset my scene. I’m sure this leak is due to snapshot because when I just replace snapshots by display groups, the leak disappears.
I know that when you remove a display group parent, all its display objects are removed. Is it the same for snapshots?
Here is some basic code to illustrate what I’m saying:
print("init") if snaps then for i=#snaps,1,-1 do snaps[i]:removeSelf() snaps[i] = nil end end snaps = {} for i = 1, 30 do local snap = display.newSnapshot(640, 980) snaps[#snaps+1] = snap for j=1,100 do local b = display.newImageRect(snap.group, "bloc.png", 50, 50) end end
This piece of code is executed each time I reset my game and it produces something like in the terminal:
17:32:33.733 Platform: iPhone / x64 / 10.0 / GeForce GTX 680/PCIe/SSE2 / 4.5.0 NVIDIA 385.41 / 2017.3068 / fr_FR | FR | fr_FR | fr
17:32:33.733 Loading project from: C:\Users\David\Documents\GitHub\dragonvslava
17:32:33.733 Project sandbox folder: C:\Users\David\AppData\Local\Corona Labs\Corona Simulator\Sandbox\dragonvslava-9C1D21FFA0693D9EFABA8539C3F9629A\Documents
17:32:33.935 init
17:32:34.189 System Memory: 1074 KB Texture Memory: 444.013 MB
17:32:35.176 System Memory: 1341 KB Texture Memory: 444.556 MB
17:32:36.106 System Memory: 1332 KB Texture Memory: 444.556 MB
17:32:37.048 System Memory: 1319 KB Texture Memory: 444.556 MB
17:32:37.979 System Memory: 1310 KB Texture Memory: 444.556 MB
17:32:38.922 System Memory: 1321 KB Texture Memory: 444.556 MB
17:32:39.864 System Memory: 1341 KB Texture Memory: 444.747 MB
17:32:40.794 System Memory: 1343 KB Texture Memory: 444.747 MB
17:32:41.735 System Memory: 1336 KB Texture Memory: 444.728 MB
17:32:42.669 System Memory: 1260 KB Texture Memory: 444.728 MB
17:32:43.018 init
17:32:43.270 System Memory: 1622 KB Texture Memory: 445.033 MB
17:32:44.211 System Memory: 1731 KB Texture Memory: 445.052 MB
17:32:45.139 System Memory: 1775 KB Texture Memory: 445.052 MB
17:32:46.087 System Memory: 1693 KB Texture Memory: 445.052 MB
17:32:47.016 System Memory: 1761 KB Texture Memory: 445.052 MB
17:32:47.955 System Memory: 1717 KB Texture Memory: 445.052 MB
17:32:48.888 System Memory: 1811 KB Texture Memory: 445.052 MB
17:32:49.825 System Memory: 1723 KB Texture Memory: 445.052 MB
17:32:50.772 System Memory: 1741 KB Texture Memory: 445.033 MB
17:32:51.708 System Memory: 1635 KB Texture Memory: 445.033 MB
17:32:52.461 init
17:32:52.746 System Memory: 2117 KB Texture Memory: 444.728 MB
17:32:53.712 System Memory: 2212 KB Texture Memory: 444.747 MB
17:32:54.644 System Memory: 2282 KB Texture Memory: 444.747 MB
17:32:55.583 System Memory: 2275 KB Texture Memory: 444.747 MB
17:32:56.521 System Memory: 2272 KB Texture Memory: 444.747 MB
17:32:57.455 System Memory: 2265 KB Texture Memory: 444.747 MB
17:32:58.388 System Memory: 2279 KB Texture Memory: 444.747 MB
17:32:59.327 System Memory: 2274 KB Texture Memory: 444.747 MB
17:33:00.342 System Memory: 2202 KB Texture Memory: 444.728 MB
17:33:01.278 System Memory: 2124 KB Texture Memory: 444.728 MB
17:33:01.965 init
17:33:02.220 System Memory: 2480 KB Texture Memory: 445.119 MB
17:33:03.159 System Memory: 2581 KB Texture Memory: 445.138 MB
17:33:04.091 System Memory: 2611 KB Texture Memory: 445.138 MB
17:33:05.032 System Memory: 2607 KB Texture Memory: 445.138 MB
17:33:05.975 System Memory: 2644 KB Texture Memory: 445.138 MB
As you can see, System Memory is growing bigger and bigger.
If you just replace display.newSnapShot with a display.newGroup, no problem:
17:47:18.192 Platform: iPhone / x64 / 10.0 / GeForce GTX 680/PCIe/SSE2 / 4.5.0 NVIDIA 385.41 / 2017.3068 / fr_FR | FR | fr_FR | fr
17:47:18.192 Loading project from: C:\Users\David\Documents\GitHub\dragonvslava
17:47:18.192 Project sandbox folder: C:\Users\David\AppData\Local\Corona Labs\Corona Simulator\Sandbox\dragonvslava-9C1D21FFA0693D9EFABA8539C3F9629A\Documents
17:47:18.384 init
17:47:18.656 System Memory: 1081 KB Texture Memory: 32.274 MB
17:47:19.632 System Memory: 1343 KB Texture Memory: 32.817 MB
17:47:20.571 System Memory: 1332 KB Texture Memory: 32.817 MB
17:47:21.499 System Memory: 1328 KB Texture Memory: 32.817 MB
17:47:22.435 System Memory: 1317 KB Texture Memory: 32.817 MB
17:47:23.381 System Memory: 1306 KB Texture Memory: 32.817 MB
17:47:24.312 System Memory: 1335 KB Texture Memory: 33.008 MB
17:47:25.257 System Memory: 1350 KB Texture Memory: 33.008 MB
17:47:26.191 System Memory: 1350 KB Texture Memory: 32.989 MB
17:47:27.130 System Memory: 1271 KB Texture Memory: 32.989 MB
17:47:27.720 init
17:47:27.964 System Memory: 1333 KB Texture Memory: 32.874 MB
17:47:28.893 System Memory: 1337 KB Texture Memory: 32.893 MB
17:47:29.830 System Memory: 1334 KB Texture Memory: 32.893 MB
17:47:30.769 System Memory: 1343 KB Texture Memory: 32.893 MB
17:47:31.703 System Memory: 1325 KB Texture Memory: 32.893 MB
17:47:32.643 System Memory: 1316 KB Texture Memory: 32.893 MB
17:47:33.580 System Memory: 1348 KB Texture Memory: 32.893 MB
17:47:34.521 System Memory: 1348 KB Texture Memory: 32.893 MB
17:47:35.451 System Memory: 1342 KB Texture Memory: 32.874 MB
17:47:36.393 System Memory: 1258 KB Texture Memory: 32.874 MB
17:47:37.017 init
17:47:37.263 System Memory: 1338 KB Texture Memory: 32.416 MB
17:47:38.210 System Memory: 1324 KB Texture Memory: 32.435 MB
17:47:39.136 System Memory: 1320 KB Texture Memory: 32.435 MB
17:47:40.085 System Memory: 1350 KB Texture Memory: 32.435 MB
17:47:41.012 System Memory: 1345 KB Texture Memory: 32.435 MB
17:47:41.959 System Memory: 1333 KB Texture Memory: 32.436 MB
17:47:42.895 System Memory: 1340 KB Texture Memory: 32.435 MB
17:47:43.832 System Memory: 1350 KB Texture Memory: 32.435 MB
17:47:44.761 System Memory: 1354 KB Texture Memory: 32.416 MB
17:47:45.710 System Memory: 1260 KB Texture Memory: 32.416 MB
17:47:46.640 System Memory: 1261 KB Texture Memory: 32.416 MB
17:47:47.585 System Memory: 1264 KB Texture Memory: 32.416 MB
