REST Resource: vitals.slowrenderingrate

  • The Slow Rendering Rate Metric Set provides insights into low-level rendering data for games, specifically focusing on frame rates handled by SurfaceFlinger.

  • A session is considered slow if over 25% of its frames fail to achieve the target frame rate (20fps or 30fps).

  • Metrics include percentages of slow-rendering users, rolling averages weighted by distinct users, and the count of distinct users used for normalization.

  • You can segment this data using various dimensions like API level, device model, country, RAM, and CPU/GPU details to identify performance bottlenecks.

  • This metric set requires the "View app information (read-only)" permission and allows you to describe its properties and query its metrics.

Resource: SlowRenderingRateMetricSet

Singleton resource representing the set of Slow Rendering metrics.

This metric set contains low-level rendering data captured by SurafeFlinger. Sessions are evaluated based on the present-to-present histogram of frames handled by any SurfaceFlinger layer owned by the app.

A slow session is a session where more than 25% of frames for the session did not meet the metric's target frame rate (either 20fps, or 30fps).

NOTE: This metric set is only available for games.

Supported aggregation periods:

  • DAILY: metrics are aggregated in calendar date intervals. Due to historical constraints, the only supported timezone is America/Los_Angeles.

Supported metrics:

  • slowRenderingRate20Fps (google.type.Decimal): Percentage of distinct users in the aggregation period that had slow rendering.
  • slowRenderingRate20Fps7dUserWeighted (google.type.Decimal): Rolling average value of slowRenderingRate20Fps in the last 7 days. The daily values are weighted by the count of distinct users for the day.
  • slowRenderingRate20Fps28dUserWeighted (google.type.Decimal): Rolling average value of slowRenderingRate20Fps in the last 28 days. The daily values are weighted by the count of distinct users for the day.
  • slowRenderingRate30Fps (google.type.Decimal): Percentage of distinct users in the aggregation period that had slow rendering.
  • slowRenderingRate30Fps7dUserWeighted (google.type.Decimal): Rolling average value of slowRenderingRate30Fps in the last 7 days. The daily values are weighted by the count of distinct users for the day.
  • slowRenderingRate30Fps28dUserWeighted (google.type.Decimal): Rolling average value of slowRenderingRate30Fps in the last 28 days. The daily values are weighted by the count of distinct users for the day.
  • distinctUsers (google.type.Decimal): Count of distinct users in the aggregation period that were used as normalization value for the slowRenderingRate20Fps/slowRenderingRate30Fps metric. A user is counted in this metric if their app rendered any frames. Care must be taken not to aggregate this count further, as it may result in users being counted multiple times. The value is rounded to the nearest multiple of 10, 100, 1,000 or 1,000,000, depending on the magnitude of the value.

Supported dimensions:

  • apiLevel (string): the API level of Android that was running on the user's device, e.g., 26.
  • versionCode (int64): version of the app that was running on the user's device.
  • deviceModel (string): unique identifier of the user's device model. The form of the identifier is 'deviceBrand/device', where deviceBrand corresponds to Build.BRAND and device corresponds to Build.DEVICE, e.g., google/coral.
  • deviceBrand (string): unique identifier of the user's device brand, e.g., google.
  • deviceType (string): the type (also known as form factor) of the user's device, e.g., PHONE.
  • countryCode (string): the country or region of the user's device based on their IP address, represented as a 2-letter ISO-3166 code (e.g. US for the United States).
  • deviceRamBucket (int64): RAM of the device, in MB, in buckets (3GB, 4GB, etc.).
  • deviceSocMake (string): Make of the device's primary system-on-chip, e.g., Samsung. Reference
  • deviceSocModel (string): Model of the device's primary system-on-chip, e.g., "Exynos 2100". Reference
  • deviceCpuMake (string): Make of the device's CPU, e.g., Qualcomm.
  • deviceCpuModel (string): Model of the device's CPU, e.g., "Kryo 240".
  • deviceGpuMake (string): Make of the device's GPU, e.g., ARM.
  • deviceGpuModel (string): Model of the device's GPU, e.g., Mali.
  • deviceGpuVersion (string): Version of the device's GPU, e.g., T750.
  • deviceVulkanVersion (string): Vulkan version of the device, e.g., "4198400".
  • deviceGlEsVersion (string): OpenGL ES version of the device, e.g., "196610".
  • deviceScreenSize (string): Screen size of the device, e.g., NORMAL, LARGE.
  • deviceScreenDpi (string): Screen density of the device, e.g., mdpi, hdpi.

Required permissions: to access this resource, the calling user needs the View app information (read-only) permission for the app.

JSON representation 
{
  "name": string,
  "freshnessInfo": {
    object (FreshnessInfo)
  }
}
Fields
name

string

Identifier. The resource name.

Format: apps/{app}/slowRenderingRateMetricSet
freshnessInfo

object (FreshnessInfo)

Summary about data freshness in this resource.

Methods

get

 Describes the properties of the metric set.

query

 Queries the metrics in the metric set.