ci: Increase Playwright test parallelism (#18484)

.github/workflows/e2e-reusable.yml

@@ -30,7 +30,7 @@ on:
       containers:
         description: 'Number of containers to run tests in.'
         required: false
-        default: '[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15]'
+        default: '[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]'
         type: string
       pr_number:
         description: 'PR number to run tests for.'

.github/workflows/playwright-test-reusable.yml

@@ -11,7 +11,7 @@ on:
       shards:
         description: 'Shards for parallel execution'
         required: false
-        default: '[1]'
+        default: '[1, 2]'
         type: string
       docker-image:
         description: 'Docker image to use (for docker-pull mode)'
@@ -28,6 +28,7 @@ env:
   NODE_OPTIONS: --max-old-space-size=3072
   # Disable Ryuk to avoid issues with Docker since it needs privileged access, containers are cleaned on teardown anyway
   TESTCONTAINERS_RYUK_DISABLED: true
+  PLAYWRIGHT_WORKERS: 3 # We have 2 CPUs on this runner but we can use more workers since it's low CPU intensive
 
 jobs:
   test:
@@ -35,7 +36,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        shard: ${{ fromJSON(inputs.shards || '[1]') }}
+        shard: ${{ fromJSON(inputs.shards || '[1, 2]') }}
     name: Test (Shard ${{ matrix.shard }}/${{ strategy.job-total }})
 
     steps:
@@ -61,7 +62,7 @@ jobs:
         run: |
           pnpm --filter=n8n-playwright test:local \
             --shard=${{ matrix.shard }}/${{ strategy.job-total }} \
-            --workers=2
+            --workers=${{ env.PLAYWRIGHT_WORKERS }}
         env:
           CURRENTS_RECORD_KEY: ${{ secrets.CURRENTS_RECORD_KEY }}
 
@@ -70,7 +71,7 @@ jobs:
         run: |
           pnpm --filter=n8n-playwright test:container:standard \
             --shard=${{ matrix.shard }}/${{ strategy.job-total }} \
-            --workers=2
+            --workers=${{ env.PLAYWRIGHT_WORKERS }}
         env:
           N8N_DOCKER_IMAGE: ${{ inputs.test-mode == 'docker-build' && 'n8nio/n8n:local' || inputs.docker-image }}
           CURRENTS_RECORD_KEY: ${{ secrets.CURRENTS_RECORD_KEY }}