7.5Setting Budgets for Different Page Types

Not all pages have the same performance requirements. Set per-page budgets based on business impact:

{
  "ci": {
    "collect": {
      "url": [
        "https://staging.example.com/",
        "https://staging.example.com/products/1",
        "https://staging.example.com/checkout"
      ]
    },
    "assert": {
      "assertMatrix": [
        {
          "matchingUrlPattern": ".*/$",
          "assertions": {
            "largest-contentful-paint": ["error", { "maxNumericValue": 2000 }],
            "categories:performance": ["error", { "minScore": 0.95 }]
          }
        },
        {
          "matchingUrlPattern": ".*/products/.*",
          "assertions": {
            "largest-contentful-paint": ["error", { "maxNumericValue": 2500 }],
            "categories:performance": ["error", { "minScore": 0.9 }]
          }
        },
        {
          "matchingUrlPattern": ".*/checkout",
          "assertions": {
            "largest-contentful-paint": ["error", { "maxNumericValue": 3000 }],
            "total-blocking-time": ["error", { "maxNumericValue": 200 }],
            "categories:performance": ["error", { "minScore": 0.85 }]
          }
        }
      ]
    }
  }
}