Concern Regarding Extremely Slow Deployment Time via GitHub CI/CD to Azure App Service

Rashmi Panda 0 Reputation points
2025-05-01T18:33:50.29+00:00

Dear Azure Support Team,

I am currently using Azure App Service Web App to host our backend (NestJS) and frontend (Vue.js) applications. We are leveraging GitHub Actions for CI/CD deployment. Initially, our deployments would complete within approximately 10 minutes. However, in recent times, the deployment duration has significantly increased, now taking around 40–50 minutes per deployment.

The major delay appears to be in the following step of the workflow:

- name: 'Deploy to Azure Web App'
  id: deploy-to-webapp
  uses: azure/webapps-deploy@v3
  with:
    app-name: 'xxxxxx'
    slot-name: 'Production'
    package: .

From the deployment logs, it is evident that a single step—incremental deployment—consumes almost 40 minutes:

{ "log_time": "2025-05-01T16:38:54.051Z", "message": "Incrementally deploying to /home/site/wwwroot" }, { "log_time": "2025-05-01T17:17:52.322Z", "message": "Build completed successfully." }

This specific process used to complete much faster, and we have not made any significant changes that would justify such a drastic increase in deployment time.

Here is the GitHub Actions workflow file we are using:

Docs for Azure Web Apps Deploy action: https://github.com/Azure/webapps-deploy

name: Build and deploy Node.js app to Azure Web App - name_xxx

on: push:

branches:
  - deployment_internal
```  workflow_dispatch:

jobs:
  build:
```yaml
runs-on: ubuntu-latest
permissions:
  contents: read

steps:
  - uses: actions/checkout@v4

  - name: Set up Node.js version
    uses: actions/setup-node@v3
    with:
      node-version: '20.x'

  - name: npm install, build
    run: |
      npm install
      npm run build

  - name: Zip artifact for deployment
    run: zip release.zip ./* -r

  - name: Upload artifact for deployment job
    uses: actions/upload-artifact@v4
    with:
      name: node-app
      path: release.zip
```  deploy:
```yaml
runs-on: ubuntu-latest
needs: build
environment:
  name: 'Production'
  url: ${{ steps.deploy-to-webapp.outputs.webapp-url }}
permissions:
  id-token: write
  contents: read

steps:
  - name: Download artifact from build job
    uses: actions/download-artifact@v4
    with:
      name: node-app

  - name: Unzip artifact for deployment
    run: unzip release.zip

  - name: Login to Azure
    uses: azure/login@v2
    with:
      client-id: ${{ secrets.AZUREAPPSERVICE_CLIENTID_xxxx }}
      tenant-id: ${{ secrets.AZUREAPPSERVICE_TENANTID_xxxx }}
      subscription-id: ${{ secrets.AZUREAPPSERVICE_SUBSCRIPTIONID_xxxx }}

  - name: 'Deploy to Azure Web App'
    id: deploy-to-webapp
    uses: azure/webapps-deploy@v3
    with:
      app-name: 'xxxx'
      slot-name: 'Production'
      package: .
```I would greatly appreciate it if you could help me understand:

Why the incremental deployment step is taking almost 40-50 minutes.

Whether there are any known limitations or recent changes on the Azure platform that could be causing this.

How I can optimize my workflow YAML or deployment strategy to restore the fast deployment times we had initially.

Looking forward to your valuable guidance and support on this matter.

Azure App Service
Azure App Service
Azure App Service is a service used to create and deploy scalable, mission-critical web apps.
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