Ptt.cc 首頁 - 批踢踢實業坊
ptt.cc Desktop Performance
93/100
These metrics represent real-world Chrome users experience viewing ptt.cc web page. Reports are focused on loading performance and other critical factors that most affect user experience. Follow our guide to track, optimize, and improve the quality of your web pages.
User Loading Experience
First Contentful Paint
First Input Delay
Cumulative Layout Shift
Largest Contentful Paint
Metrics
Speed Index69/100 1.8 s
Speed Index shows how quickly the contents of a page are visibly populated. Learn more.
First Contentful Paint94/100 0.8 s
First Contentful Paint marks the time at which the first text or image is painted. Learn more.
Largest Contentful Paint95/100 1.0 s
Largest Contentful Paint marks the time at which the largest text or image is painted. Learn More
Cumulative Layout Shift100/100 0
Cumulative Layout Shift measures the movement of visible elements within the viewport. Learn more.
Total Blocking Time100/100 0 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds. Learn more.
Time to Interactive100/100 0.8 s
Time to interactive is the amount of time it takes for the page to become fully interactive. Learn more.
Should Fix (8)
Opportunities
These suggestions can help your page load faster. They don't directly affect the Performance score.
Avoid multiple page redirects
Potential savings of 530 ms
530 ms
Eliminate render-blocking resources
Potential savings of 230 ms
228 ms
Reduce initial server response time
Root document took 780 ms
183 ms
Diagnostics
More information about the performance of your application. These numbers don't directly affect the Performance score.
Uses efficient cache policy on static assets
10 resources found
Keep request counts low and transfer sizes small
16 requests • 42 KiB
Largest Contentful Paint element
1 element found
Avoid long main-thread tasks
1 long task found
Avoid chaining critical requests
1 chain found
Passed Audits (20)
Uses passive listeners to improve scrolling performance
Avoids enormous network payloads
Total size was 42 KiB
Minify JavaScript
Enable text compression
Minimize third-party usage
Third-party code blocked the main thread for 0 ms
Efficiently encode images
Minify CSS
Use video formats for animated content
Preload key requests
Serve images in next-gen formats
Avoids `document.write()`
Properly size images
JavaScript execution time
0.0 s
All text remains visible during webfont loads
Remove unused CSS
Minimizes main-thread work
0.3 s
Preconnect to required origins
Remove unused JavaScript
Defer offscreen images
Avoids an excessive DOM size
105 elements
ptt.cc Desktop SEO
78/100
These checks ensure that your page is optimized for search engine results ranking. There are additional factors Lighthouse does not check that may affect your search ranking. Learn more. Run these additional validators on your site to check additional SEO best practices.
Should Fix (2)
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Document does not have a meta description
Mobile Friendly
Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. Learn more.
Does not have a `<meta name="viewport">` tag with `width` or `initial-scale`
Passed Audits (7)
Document has a `<title>` element
Document avoids plugins
Document has a valid `hreflang`
Links have descriptive text
Page isn’t blocked from indexing
Page has successful HTTP status code
Links are crawlable
ptt.cc Desktop Best Practices
92/100
These checks highlight opportunities to improve the overall code health of ptt.cc page. Current recommendations will help to make your page fast and secure, to create a good user experience and to avoid deprecated technologies.
Should Fix (1)
Trust and Safety
Does not use HTTPS
2 insecure requests found
Passed Audits (13)
No browser errors logged to the console
Links to cross-origin destinations are safe
Detected JavaScript libraries
Page has the HTML doctype
Avoids requesting the notification permission on page load
Avoids Application Cache
Serves images with appropriate resolution
Displays images with correct aspect ratio
Avoids deprecated APIs
Allows users to paste into password fields
Avoids requesting the geolocation permission on page load
Properly defines charset
Avoids front-end JavaScript libraries with known security vulnerabilities
ptt.cc Desktop Progressive Web App
37/100
These checks validate the aspects of a Progressive Web App. Learn more. These checks are required by the baseline PWA Checklist but are not automatically checked by Lighthouse. They do not affect your score but it's important that you verify them manually.
Should Fix (10)
PWA Optimized
Does not set a theme color for the address bar.
Manifest doesn't have a maskable icon
Does not have a `<meta name="viewport">` tag with `width` or `initial-scale`
Does not provide a valid `apple-touch-icon`
Is not configured for a custom splash screen
Fast and reliable
`start_url` does not respond with a 200 when offline
Current page does not respond with a 200 when offline
Installable
Does not use HTTPS
2 insecure requests found
Web app manifest does not meet the installability requirements
Does not register a service worker that controls page and `start_url`
Passed Audits (3)
Page load is fast enough on mobile networks
Redirects HTTP traffic to HTTPS
Contains some content when JavaScript is not available
ptt.cc Desktop Accessibility
87/100
These checks highlight opportunities to improve the accessibility of your web app. Only a subset of accessibility issues can be automatically detected so manual testing is also encouraged. These items address areas which an automated testing tool cannot cover. Learn more in our guide on conducting an accessibility review.
Should Fix (2)
Contrast
These are opportunities to improve the legibility of your content.
Background and foreground colors do not have a sufficient contrast ratio.
Internationalization and localization
These are opportunities to improve the interpretation of your content by users in different locales.
`<html>` element does not have a `[lang]` attribute
Passed Audits (11)
Heading elements appear in a sequentially-descending order
Document has a `<title>` element
`[accesskey]` values are unique
`[aria-hidden="true"]` is not present on the document `<body>`
`[id]` attributes on active, focusable elements are unique
List items (`<li>`) are contained within `<ul>` or `<ol>` parent elements
Links have a discernible name
Definition list items are wrapped in `<dl>` elements
`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.
The page contains a heading, skip link, or landmark region
Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
Desktop Speed
80/100
These checks analyze the performance of ptt.cc on desktop devices and return PageSpeed score and information on how to improve the load time. What makes a good Progressive Web App?
Should Fix (5)
Avoid landing page redirects
Eliminate render-blocking JavaScript and CSS in above-the-fold content
Leverage browser caching
Minify CSS
Optimize images
Passed Audits (5)
Enable compression
Reduce server response time
Minify HTML
Minify JavaScript
Prioritize visible content
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