CrUX in WebPageTest JSON

crux-wpt.json

{
  ...
   "CrUX":{
      "key":{
         "formFactor":"DESKTOP",
         "url":"https:\/\/techcrunch.com\/"
      },
      "metrics":{
         "first_input_delay":{
            "histogram":[
               {
                  "start":0,
                  "end":100,
                  "density":0.93982843137254357
               },
               {
                  "start":100,
                  "end":300,
                  "density":0.035171568627450779
               },
               {
                  "start":300,
                  "density":0.024999999999999849
               }
            ],
            "percentiles":{
               "p75":10
            }
         },
         "largest_contentful_paint":{
            "histogram":[
               {
                  "start":0,
                  "end":2500,
                  "density":0.59455047714716014
               },
               {
                  "start":2500,
                  "end":4000,
                  "density":0.23442993470617696
               },
               {
                  "start":4000,
                  "density":0.17101958814666157
               }
            ],
            "percentiles":{
               "p75":3321
            }
         },
         "cumulative_layout_shift":{
            "histogram":[
               {
                  "start":"0.00",
                  "end":"0.10",
                  "density":0.50811283075386726
               },
               {
                  "start":"0.10",
                  "end":"0.25",
                  "density":0.26797304043934
               },
               {
                  "start":"0.25",
                  "density":0.22391412880678907
               }
            ],
            "percentiles":{
               "p75":"0.23"
            }
         },
         "first_contentful_paint":{
            "histogram":[
               {
                  "start":0,
                  "end":1000,
                  "density":0.61315623023402255
               },
               {
                  "start":1000,
                  "end":3000,
                  "density":0.32283364958886435
               },
               {
                  "start":3000,
                  "density":0.06401012017710285
               }
            ],
            "percentiles":{
               "p75":1434
            }
         }
      }
   }
}