{
  "description": "Tough scheduler latency test cases",
  "smoothness": {
    "action": "scroll"
  },
  "pages": [
    {
      "url": "file://tough_scheduling_cases/simple_text_page.html",
      "why": "Simple scrolling baseline",
      "navigate_steps": [
        { "action": "navigate" },
        { "action": "set_synthetic_delays" }
      ]
    },
    {
      "url": "file://tough_scheduling_cases/simple_text_page.html?main_busy",
      "why": "Simulate oversubscribed main thread",
      "navigate_steps": [
        { "action": "navigate" },
        { "action": "set_synthetic_delays",
          "delays": {
            "cc.BeginMainFrame": { "target_duration": 0.008 }
          }
        }
      ]
    },
    {
      "url": "file://tough_scheduling_cases/simple_text_page.html?main_very_busy",
      "why": "Simulate oversubscribed main thread",
      "navigate_steps": [
        { "action": "navigate" },
        { "action": "set_synthetic_delays",
          "delays": {
            "cc.BeginMainFrame": { "target_duration": 0.024 }
          }
        }
      ]
    },
    {
      "url": "file://tough_scheduling_cases/simple_text_page.html?medium_layers",
      "why": "Simulate a page with a a few graphics layers",
      "navigate_steps": [
        { "action": "navigate" },
        { "action": "set_synthetic_delays",
          "delays": {
            "cc.BeginMainFrame": { "target_duration": 0.004 },
            "cc.DrawAndSwap": { "target_duration": 0.004 },
            "gpu.SwapBuffers": { "target_duration": 0.004 }
          }
        }
      ]
    },
    {
      "url": "file://tough_scheduling_cases/simple_text_page.html?many_layers",
      "why": "Simulate a page with many graphics layers",
      "navigate_steps": [
        { "action": "navigate" },
        { "action": "set_synthetic_delays",
          "delays": {
            "cc.BeginMainFrame": { "target_duration": 0.012 },
            "cc.DrawAndSwap": { "target_duration": 0.012 },
            "gpu.SwapBuffers": { "target_duration": 0.012 }
          }
        }
      ]
    },
    {
      "url": "file://tough_scheduling_cases/simple_text_page.html?medium_raster",
      "why": "Simulate a page with expensive recording and rasterization",
      "navigate_steps": [
        { "action": "navigate" },
        { "action": "set_synthetic_delays",
          "delays": {
            "cc.BeginMainFrame": { "target_duration": 0.004 },
            "cc.RasterRequiredForActivation": { "target_duration": 0.004 },
            "gpu.AsyncTexImage": { "target_duration": 0.004 }
          }
        }
      ]
    },
    {
      "url": "file://tough_scheduling_cases/simple_text_page.html?heavy_raster",
      "why": "Simulate a page with expensive recording and rasterization",
      "navigate_steps": [
        { "action": "navigate" },
        { "action": "set_synthetic_delays",
          "delays": {
            "cc.BeginMainFrame": { "target_duration": 0.024 },
            "cc.RasterRequiredForActivation": { "target_duration": 0.024 },
            "gpu.AsyncTexImage": { "target_duration": 0.024 }
          }
        }
      ]
    },
    {
      "url": "file://tough_scheduling_cases/touch_handler_scrolling.html",
      "why": "Touch handler scrolling baseline",
      "navigate_steps": [
        { "action": "navigate" },
        { "action": "set_synthetic_delays" }
      ]
    },
    {
      "url": "file://tough_scheduling_cases/touch_handler_scrolling.html?medium_handler",
      "why": "Medium cost touch handler",
      "navigate_steps": [
        { "action": "navigate" },
        { "action": "set_synthetic_delays",
          "delays": {
            "blink.HandleInputEvent": { "target_duration": 0.008 }
          }
        }
      ]
    },
    {
      "url": "file://tough_scheduling_cases/touch_handler_scrolling.html?slow_handler",
      "why": "Slow touch handler",
      "navigate_steps": [
        { "action": "navigate" },
        { "action": "set_synthetic_delays",
          "delays": {
            "blink.HandleInputEvent": { "target_duration": 0.024 }
          }
        }
      ]
    },
    {
      "url": "file://tough_scheduling_cases/touch_handler_scrolling.html?janky_handler",
      "why": "Touch handler that often takes a long time",
      "navigate_steps": [
        { "action": "navigate" },
        { "action": "set_synthetic_delays",
          "delays": {
            "blink.HandleInputEvent": { "target_duration": 0.024, "mode": "alternating" }
          }
        }
      ]
    },
    {
      "url": "file://tough_scheduling_cases/touch_handler_scrolling.html?occasionally_janky_handler",
      "why": "Touch handler that occasionally takes a long time",
      "navigate_steps": [
        { "action": "navigate" },
        { "action": "set_synthetic_delays",
          "delays": {
            "blink.HandleInputEvent": { "target_duration": 0.024, "mode": "oneshot" }
          }
        }
      ]
    },
    {
      "url": "file://tough_scheduling_cases/touch_handler_scrolling.html?super_slow_handler",
      "why": "Super expensive touch handler causes browser to scroll after a timeout",
      "navigate_steps": [
        { "action": "navigate" },
        { "action": "set_synthetic_delays",
          "delays": {
            "blink.HandleInputEvent": { "target_duration": 0.2 }
          }
        }
      ]
    },
    {
      "url": "file://tough_scheduling_cases/div_touch_handler.html",
      "why": "Super expensive touch handler that only occupies a part of the page",
      "navigate_steps": [
        { "action": "navigate" },
        { "action": "set_synthetic_delays",
          "delays": {
            "blink.HandleInputEvent": { "target_duration": 0.2 }
          }
        }
      ]
    },
    {
      "url": "file://tough_scheduling_cases/raf.html",
      "why": "requestAnimationFrame scrolling baseline",
      "navigate_steps": [
        { "action": "navigate" },
        { "action": "set_synthetic_delays" }
      ]
    },
    {
      "url": "file://tough_scheduling_cases/raf_canvas.html",
      "why": "Test canvas blocking behavior",
      "navigate_steps": [
        { "action": "navigate" },
        { "action": "set_synthetic_delays" }
      ]
    },
    {
      "url": "file://tough_scheduling_cases/raf.html?medium_handler",
      "why": "Test a moderately heavy requestAnimationFrame handler",
      "navigate_steps": [
        { "action": "navigate" },
        { "action": "set_synthetic_delays",
          "delays": {
            "cc.BeginMainFrame": { "target_duration": 0.004 },
            "cc.RasterRequiredForActivation": { "target_duration": 0.004 },
            "gpu.AsyncTexImage": { "target_duration": 0.004 }
          }
        }
      ]
    },
    {
      "url": "file://tough_scheduling_cases/raf.html?heavy_handler",
      "why": "Test a moderately heavy requestAnimationFrame handler",
      "navigate_steps": [
        { "action": "navigate" },
        { "action": "set_synthetic_delays",
          "delays": {
            "cc.BeginMainFrame": { "target_duration": 0.024 },
            "cc.RasterRequiredForActivation": { "target_duration": 0.024 },
            "gpu.AsyncTexImage": { "target_duration": 0.024 }
          }
        }
      ]
    },
    {
      "url": "file://tough_scheduling_cases/raf.html?gpu_bound",
      "why": "Simulate a heavily GPU bound page",
      "navigate_steps": [
        { "action": "navigate" },
        { "action": "set_synthetic_delays",
          "delays": {
            "gpu.SwapBuffers": { "target_duration": 0.1 }
          }
        }
      ]
    },
    {
      "url": "file://tough_scheduling_cases/raf_touch_animation.html",
      "why": "Stress test for the scheduler",
      "navigate_steps": [
        { "action": "navigate" },
        { "action": "set_synthetic_delays" }
      ]
    },
    {
      "url": "file://tough_scheduling_cases/raf_touch_animation.html?medium",
      "why": "Medium stress test for the scheduler",
      "navigate_steps": [
        { "action": "navigate" },
        { "action": "set_synthetic_delays",
          "delays": {
            "cc.BeginMainFrame": { "target_duration": 0.004 },
            "cc.DrawAndSwap": { "target_duration": 0.004 }
          }
        }
      ]
    },
    {
      "url": "file://tough_scheduling_cases/raf_touch_animation.html?heavy",
      "why": "Heavy stress test for the scheduler",
      "navigate_steps": [
        { "action": "navigate" },
        { "action": "set_synthetic_delays",
          "delays": {
            "cc.BeginMainFrame": { "target_duration": 0.012 },
            "cc.DrawAndSwap": { "target_duration": 0.012 }
          }
        }
      ]
    }
  ]
}