Queries the Chrome User Experience for a single record for a given site. Returns a record that contains one or more metrics corresponding to performance data about the requested site.

Required Request Value

The request value is a data-structure with various fields. Each field may be a simple scalar or another data-structure. In the latter case it is advised to set the field-cursor to the data-structure's field to specify values more concisely.

For example, a structure like this:

QueryRequest:
  effective-connection-type: string
  form-factor: string
  metrics: [string]
  origin: string
  url: string

can be set completely with the following arguments which are assumed to be executed in the given order. Note how the cursor position is adjusted to the respective structures, allowing simple field names to be used most of the time.

  • -r . effective-connection-type=voluptua.
    • The effective connection type is a query dimension that specifies the effective network class that the record's data should belong to. This field uses the values ["offline", "slow-2G", "2G", "3G", "4G"] as specified in: https://wicg.github.io/netinfo/#effective-connection-types Note: If no effective connection type is specified, then a special record with aggregated data over all effective connection types will be returned.
  • form-factor=at
    • The form factor is a query dimension that specifies the device class that the record's data should belong to. Note: If no form factor is specified, then a special record with aggregated data over all form factors will be returned.
  • metrics=sanctus
    • The metrics that should be included in the response. If none are specified then any metrics found will be returned. Allowed values: ["first_contentful_paint", "first_input_delay", "largest_contentful_paint", "cumulative_layout_shift", "experimental_time_to_first_byte", "experimental_interaction_to_next_paint"]
    • Each invocation of this argument appends the given value to the array.
  • origin=sed
    • The url pattern "origin" refers to a url pattern that is the origin of a website. Examples: "https://example.com", "https://cloud.google.com"
  • url=amet.
    • The url pattern "url" refers to a url pattern that is any arbitrary url. Examples: "https://example.com/", "https://cloud.google.com/why-google-cloud/"

About Cursors

The cursor position is key to comfortably set complex nested structures. The following rules apply:

  • The cursor position is always set relative to the current one, unless the field name starts with the . character. Fields can be nested such as in -r f.s.o .
  • The cursor position is set relative to the top-level structure if it starts with ., e.g. -r .s.s
  • You can also set nested fields without setting the cursor explicitly. For example, to set a value relative to the current cursor position, you would specify -r struct.sub_struct=bar.
  • You can move the cursor one level up by using ... Each additional . moves it up one additional level. E.g. ... would go three levels up.

Optional Output Flags

The method's return value a JSON encoded structure, which will be written to standard output by default.

  • -o out
    • out specifies the destination to which to write the server's result to. It will be a JSON-encoded structure. The destination may be - to indicate standard output, or a filepath that is to contain the received bytes. If unset, it defaults to standard output.

Optional General Properties

The following properties can configure any call, and are not specific to this method.

  • -p $-xgafv=string

    • V1 error format.

  • -p access-token=string

    • OAuth access token.

  • -p alt=string

    • Data format for response.

  • -p callback=string

    • JSONP

  • -p fields=string

    • Selector specifying which fields to include in a partial response.

  • -p key=string

    • API key. Your API key identifies your project and provides you with API access, quota, and reports. Required unless you provide an OAuth 2.0 token.

  • -p oauth-token=string

    • OAuth 2.0 token for the current user.

  • -p pretty-print=boolean

    • Returns response with indentations and line breaks.

  • -p quota-user=string

    • Available to use for quota purposes for server-side applications. Can be any arbitrary string assigned to a user, but should not exceed 40 characters.

  • -p upload-type=string

    • Legacy upload protocol for media (e.g. "media", "multipart").

  • -p upload-protocol=string

    • Upload protocol for media (e.g. "raw", "multipart").