)]}'
{
  "commit": "bb96f79d0e15daa9af7b11b2868baeb052d136d9",
  "tree": "e48a7c2611ae1705923ee8cba9fe5646fcf55e59",
  "parents": [
    "f1223ce969c78b15d536fa6a4a917b0deaedeb22"
  ],
  "author": {
    "name": "Nicolas Capens",
    "email": "capn@google.com",
    "time": "Tue Nov 17 15:03:41 2020 -0500"
  },
  "committer": {
    "name": "Nicolas Capens",
    "email": "nicolascapens@google.com",
    "time": "Tue Nov 17 21:44:11 2020 +0000"
  },
  "message": "Disable code generation optimization for MSan builds\n\nLLVM intermediate code instrumented by MemorySanitizer can take an\ninordinate amount of time to compile into machine code when using the\nllvm::CodeGenOpt::Default optimization level.\n\nWhile lower optimization levels can make the generated code slower to\nexecute, the \u0027None\u0027 level is just 5-20% slower, which is negligible\ncompared to the slowdown from the instructions added by the MSan\ninstrumentation itself.\n\nllvm::CodeGenOpt::Default:\n\n-------------------------------------------------\nBenchmark                                    Time\n-------------------------------------------------\nClearImage/VK_FORMAT_R8G8B8A8_UNORM      0.912 ms\nClearImage/VK_FORMAT_R32_SFLOAT           3.83 ms\nClearImage/VK_FORMAT_D32_SFLOAT          0.866 ms\nTriangle/Hello                           0.996 ms\nTriangle/Multisample                      4.63 ms\n\nllvm::CodeGenOpt::None:\n\n-------------------------------------------------\nBenchmark                                    Time\n-------------------------------------------------\nClearImage/VK_FORMAT_R8G8B8A8_UNORM      0.974 ms\nClearImage/VK_FORMAT_R32_SFLOAT           5.42 ms\nClearImage/VK_FORMAT_D32_SFLOAT          0.937 ms\nTriangle/Hello                            1.16 ms\nTriangle/Multisample                      4.70 ms\n\nBug: b/173257647\nChange-Id: I0d14bf1834ce23045409fa162153991cabbeac3c\nReviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/50448\nPresubmit-Ready: Nicolas Capens \u003cnicolascapens@google.com\u003e\nReviewed-by: Antonio Maiorano \u003camaiorano@google.com\u003e\nTested-by: Nicolas Capens \u003cnicolascapens@google.com\u003e\nKokoro-Result: kokoro \u003cnoreply+kokoro@google.com\u003e\n",
  "tree_diff": [
    {
      "type": "modify",
      "old_id": "4c08ddd7bed257f3c3194fe323ed0c3001bdb011",
      "old_mode": 33188,
      "old_path": "src/Reactor/Nucleus.hpp",
      "new_id": "b300d9bc9ebc939e36cc4a8084108fe47942622e",
      "new_mode": 33188,
      "new_path": "src/Reactor/Nucleus.hpp"
    },
    {
      "type": "modify",
      "old_id": "05d592569461b67202ca67b0861413393498cf97",
      "old_mode": 33188,
      "old_path": "src/Reactor/Reactor.hpp",
      "new_id": "3e22ee970f624d8d16732eff19e3154337612940",
      "new_mode": 33188,
      "new_path": "src/Reactor/Reactor.hpp"
    }
  ]
}