{
  "probes": {
    "perfetto": {
      "textproto":
        '''
          buffers: {
              size_kb: 262144
              fill_policy: DISCARD
          }
          data_sources {
            config {
              name: "track_event"
              track_event_config {
                disabled_categories: "*"
                enabled_categories: "blink.user_timing"
                enabled_categories: "cppgc"
                enabled_categories: "disabled-by-default-cppgc"
                enabled_categories: "toplevel"
                enabled_categories: "v8"
                enabled_categories: "disabled-by-default-v8.gc"
                enabled_categories: "v8.memory"
                enabled_categories: "__metadata"
                timestamp_unit_multiplier: 1000
                filter_debug_annotations: false
                enable_thread_time_sampling: true
                filter_dynamic_event_names: false
              }
            }
          }
          data_sources {
            config {
              name: "org.chromium.trace_metadata2"
            }
          }
        '''
    }
  }
}