Metal vs GLSL CoreImage performance
在 WWDC 会话 510 中，Apple 工程师提出了对在
我已经一起制作了一个测试项目，它在
有时
注意：该项目不会在模拟器上运行，您需要 A8 供电设备。
看起来其中一些与硬件有关。这是我的 iPad Pro 10.5 英寸结果：
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 | glsl 1 took 229.572057723999ms glsl 2 took 49.1310358047485ms glsl 3 took 46.7269420623779ms glsl 4 took 53.08997631073ms glsl 5 took 48.9979982376099ms glsl 6 took 49.0390062332153ms glsl 7 took 52.5139570236206ms glsl 8 took 46.4930534362793ms glsl 9 took 39.6310091018677ms glsl 10 took 45.9860563278198ms metal 1 took 77.7549743652344ms metal 2 took 44.1800355911255ms metal 3 took 46.0859537124634ms metal 4 took 45.3709363937378ms metal 5 took 43.5279607772827ms metal 6 took 38.9848947525024ms metal 7 took 37.1809005737305ms metal 8 took 37.8340482711792ms metal 9 took 37.6850366592407ms metal 10 took 37.5720262527466ms |
还有我的 iPhoneSE 结果：
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 | glsl 1 took 394.147992134094ms glsl 2 took 94.601035118103ms glsl 3 took 81.4379453659058ms glsl 4 took 76.9931077957153ms glsl 5 took 77.0320892333984ms glsl 6 took 75.8579969406128ms glsl 7 took 76.9950151443481ms glsl 8 took 77.8199434280396ms glsl 9 took 79.7009468078613ms glsl 10 took 79.4800519943237ms metal 1 took 146.992921829224ms metal 2 took 88.6669158935547ms metal 3 took 81.8150043487549ms metal 4 took 78.1329870223999ms metal 5 took 79.5910358428955ms metal 6 took 93.6589241027832ms metal 7 took 94.8940515518188ms metal 8 took 89.0530347824097ms metal 9 took 84.3830108642578ms metal 10 took 77.949047088623ms |
一个问题和一个想法：
- 什么设备产生了你的结果？
- 我会很好奇，如果不同类型的过滤器，比如颜色内核会表现不同。