Web 性能分析
ID
mhpaedeeneljbnmhmofceiollddmfjcdDisplay common key web performance metrics, page-load waterfalls, resource data analysis and more.
സ്ക്രീൻഷോട്ടുകൾ
വിവരണം
Display common key web performance metrics, page-load waterfalls, resource data analysis and more.
# Performance Analysis
The Performance API is used to process and visualize data locally. No user data is collected remotely, and displaying the data does not alter the current page.
- Key performance metrics. Page unload and redirect times are excluded.
1. First byte: `responseStart - domainLookupStart`
2. First render/white screen: `responseEnd - fetchStart`
3. First interactive: `domInteractive - fetchStart`
4. DOM Ready: `domContentLoadedEventEnd - fetchStart`
5. Page load: `loadEventStart - fetchStart`
- Waterfall of metrics for each stage
1. unLoad: `unloadEventEnd - unloadEventStart`
2. Redirect: `redirectEnd - redirectStart`
3. AppCache: `domainLookupStart - fetchStart`
4. DNS: `domainLookupEnd - domainLookupStart`
5. TCP: `connectEnd - connectStart`
6. TTFB: `responseStart - requestStart`
7. Data transfer: `responseEnd - responseStart`
8. DOM: `domContentLoadedEventStart - responseEnd`
9. DCL: `domContentLoadedEventEnd - domContentLoadedEventStart`
10. Resource loading: `loadEventStart - domContentLoadedEventEnd`
11. onLoad: `loadEventEnd - loadEventStart`
- Resource analysis
1. Number of resource requests, loading size and domain distribution for the home page.
2. Domain distribution of requested resources and average time for each domain.
3. Domain distribution of resources without response headers set.
4. HTTP compression, distribution of uncompressed resources and cache hit rate.
5. Resource types.
6. Display resource loading and AJAX request durations.