Nest integration high CPU usage on armv7 / raspberry pi in pubsub subscriber native code

The problem

When I enable the Google Nest integration, I see a continous CPU load of python3 of about 65% Without this integration CPU load of python3 is just about 2%

Any recommendation to optimize the load of the Google Nest integration?

What version of Home Assistant Core has the issue?

2022.2.9

What was the last working version of Home Assistant Core?

No response

What type of installation are you running?

Home Assistant Container

Integration causing the issue

nest

Link to integration documentation on our website

https://www.home-assistant.io/integrations/nest

Diagnostics information

{
  "home_assistant": {
    "installation_type": "Home Assistant Container",
    "version": "2022.2.9",
    "dev": false,
    "hassio": false,
    "virtualenv": false,
    "python_version": "3.9.7",
    "docker": true,
    "arch": "armv7l",
    "timezone": "Europe/Brussels",
    "os_name": "Linux",
    "os_version": "5.10.63-v7l+",
    "run_as_root": true
  },
  "custom_components": {
    "config_editor": {
      "version": "3.0",
      "requirements": []
    },
    "hacs": {
      "version": "1.22.0",
      "requirements": [
        "aiogithubapi>=21.11.0"
      ]
    },
    "bosch": {
      "version": "0.17.3",
      "requirements": [
        "bosch-thermostat-client==0.17.3"
      ]
    },
    "afvalbeheer": {
      "version": "4.9.2",
      "requirements": [
        "rsa",
        "pycryptodome"
      ]
    },
    "authenticated": {
      "version": "21.9.0",
      "requirements": []
    }
  },
  "integration_manifest": {
    "domain": "nest",
    "name": "Nest",
    "config_flow": true,
    "dependencies": [
      "ffmpeg",
      "http",
      "media_source"
    ],
    "documentation": "https://www.home-assistant.io/integrations/nest",
    "requirements": [
      "python-nest==4.2.0",
      "google-nest-sdm==1.7.1"
    ],
    "codeowners": [
      "@allenporter"
    ],
    "quality_scale": "platinum",
    "dhcp": [
      {
        "macaddress": "18B430*"
      },
      {
        "macaddress": "641666*"
      },
      {
        "macaddress": "D8EB46*"
      },
      {
        "macaddress": "1C53F9*"
      }
    ],
    "iot_class": "cloud_push",
    "is_built_in": true
  },
  "data": {
    "subscriber": {
      "start": 1,
      "message_received": 7,
      "message_acked": 7
    },
    "devices": [
      {
        "data": {
          "name": "**REDACTED**",
          "type": "sdm.devices.types.DOORBELL",
          "assignee": "**REDACTED**",
          "traits": {
            "sdm.devices.traits.Info": {
              "customName": "**REDACTED**"
            },
            "sdm.devices.traits.CameraLiveStream": {
              "maxVideoResolution": {
                "width": 640,
                "height": 480
              },
              "videoCodecs": [
                "H264"
              ],
              "audioCodecs": [
                "AAC"
              ],
              "supportedProtocols": [
                "RTSP"
              ]
            },
            "sdm.devices.traits.CameraImage": {
              "maxImageResolution": {
                "width": 1920,
                "height": 1200
              }
            },
            "sdm.devices.traits.CameraPerson": {},
            "sdm.devices.traits.CameraSound": {},
            "sdm.devices.traits.CameraMotion": {},
            "sdm.devices.traits.CameraEventImage": {},
            "sdm.devices.traits.DoorbellChime": {}
          },
          "parentRelations": [
            {
              "parent": "**REDACTED**",
              "displayName": "**REDACTED**"
            }
          ]
        },
        "command": {
          "sdm.devices.commands.CameraLiveStream.GenerateRtspStream": 1
        },
        "event_media": {
          "event": 2,
          "event.new": 2,
          "event.fetch": 2,
          "fetch_image": 2,
          "fetch_image.skip": 2,
          "event.notify": 2
        }
      }
    ]
  }
}

Example YAML snippet

No response

Anything in the logs that might be useful for us?

No response

Additional information

No response

[allenporter]

Fantastic.That meets the description of the issue I was seeing when debugging.

Last time I bumped grpc there were some other dependency issues for protobuf 4. If these aren’t resolved yet it may not just be a trivial bump, but either way I’ll manage it.

[allenporter]

grpc 1.51.1 was integrated in https://github.com/home-assistant/core/pull/83420

Perhaps we can confirm folks see this helps on a dev build and we can consider this closed.