| Avoid slowing down the critical rendering path (avoidRenderBlocking) | The page has 5 blocking requests and 0 in body parser blocking (3 JavaScript and 0 CSS). | 70 |
| Description: The critical rendering path is what the browser needs to do to start rendering the page. Every file requested inside of the head element will postpone the rendering of the page, because the browser need to do the request. Avoid loading JavaScript synchronously inside of the head (you should not need JavaScript to render the page), request files from the same domain as the main document (to avoid DNS lookups) and inline CSS for really fast rendering and a short rendering path. |
| Offenders: https://www.antiquites-en-france.com/js/jquery.min.js https://www.antiquites-en-france.com/vendor/jquery-ui/js/jquery-ui-1.8.22.custom.min.js https://www.antiquites-en-france.com/js/all-2.min.js https://www.antiquites-en-france.com/galleria/galleriacustom.min.js |
| Don't scale images in the browser (avoidScalingImages) | The page has 5 images that are scaled more than 100 pixels. It would be better if those images are sent so the browser don't need to scale them. | 50 |
| Description: It's easy to scale images in the browser and make sure they look good in different devices, however that is bad for performance! Scaling images in the browser takes extra CPU time and will hurt performance on mobile. And the user will download extra kilobytes (sometimes megabytes) of data that could be avoided. Don't do that, make sure you create multiple version of the same image server-side and serve the appropriate one. |
| Offenders: https://www.antiquites-en-france.com/uploads/items/thumb_blank/4535461f759aada51...77932b69452d1.jpg https://www.antiquites-en-france.com/uploads/items/thumb_blank/b2c2901f855744421...d0afc166d1030.jpg https://www.antiquites-en-france.com/uploads/items/thumb_blank/a93e4412372005ad0...3052e44451739.jpg https://www.antiquites-en-france.com/uploads/items/thumb_blank/ba32b167c531f950a...d4c6cb74db787.jpg https://www.antiquites-en-france.com/uploads/items/thumb_blank/7abe06622512c144a...5cc710ac0c346.jpg |
| Avoid using Google Tag Manager. (googleTagManager) | The page is using Google Tag Manager, this is a performance risk since non-tech users can add JavaScript to your page. | 0 |
| Description: Google Tag Manager makes it possible for non tech users to add scripts to your page that will downgrade performance. |
| Avoid CPU Long Tasks (longTasks) | The page has 2 CPU long tasks with the total of 260 ms. The total blocking time is 53 ms and 1 long task before first contentful paint with total time of 157 ms. However the CPU Long Task is depending on the computer/phones actual CPU speed, so you should measure this on the same type of the device that your user is using. Use Geckoprofiler for Firefox or Chromes tracelog to debug your long tasks. | 60 |
| Description: Long CPU tasks locks the thread. To the user this is commonly visible as a "locked up" page where the browser is unable to respond to user input; this is a major source of bad user experience on the web today. However the CPU Long Task is depending on the computer/phones actual CPU speed, so you should measure this on the same type of the device that your user is using. To debug you should use the Chrome timeline log and drag/drop it into devtools or use Firefox Geckoprofiler. |
| Offenders: unknownself |
| Avoid extra requests by setting cache headers (cacheHeaders) | The page has 14 requests that are missing a cache time. Configure a cache time so the browser doesn't need to download them every time. It will save 64.7 kB the next access. | 0 |
| Description: The easiest way to make your page fast is to avoid doing requests to the server. Setting a cache header on your server response will tell the browser that it doesn't need to download the asset again during the configured cache time! Always try to set a cache time if the content doesn't change for every request. |
| Offenders: https://www.antiquites-en-france.com/css/all.min.css https://www.antiquites-en-france.com/galleria/galleriacustom.min.js https://www.antiquites-en-france.com/uploads/items/thumb_blank/0.jpg https://www.antiquites-en-france.com/uploads/items/thumb_blank/538a9e901933f4273...813324d8176c7.jpg https://www.antiquites-en-france.com/uploads/items/thumb_blank/593c63910b67fdb32...d315965855ba2.jpg https://www.antiquites-en-france.com/uploads/items/thumb_blank/a99b958bfae883cb2...b2a89637f7eb4.jpg https://www.antiquites-en-france.com/uploads/items/thumb_blank/b6541d9e44268d60c...591a917715801.jpg https://www.antiquites-en-france.com/uploads/items/thumb_blank/7180afd96ff1759d2...b8c2a90f9d2d4.jpg https://www.antiquites-en-france.com/uploads/items/thumb_blank/d36982a2b3fa39543...605c24e6680d3.jpg https://www.antiquites-en-france.com/uploads/items/thumb_mini/775a7a2b7aca65f82a...e0cc23b23de3b.jpg https://www.antiquites-en-france.com/display/member/19635/19635?rand=1131790051 https://www.antiquites-en-france.com/uploads/magazine/18/banner.jpg https://www.antiquites-en-france.com/uploads/magazine/10/thumb.jpg https://www.antiquites-en-france.com/uploads/items/thumb_blank/0.jpg |
| Long cache headers is good (cacheHeadersLong) | The page has 18 requests that have a shorter cache time than 30 days (but still a cache time). | 82 |
| Description: Setting a cache header is good. Setting a long cache header (at least 30 days) is even better beacause then it will stay long in the browser cache. But what do you do if that asset change? Rename it and the browser will pick up the new version. |
| Offenders: https://www.antiquites-en-france.com/js/jquery.min.js https://www.antiquites-en-france.com/vendor/jquery-ui/js/jquery-ui-1.8.22.custom.min.js https://www.antiquites-en-france.com/js/all-2.min.js https://www.antiquites-en-france.com/uploads/items/thumb_blank/4535461f759aada51...77932b69452d1.jpg https://www.antiquites-en-france.com/uploads/items/thumb_blank/b2c2901f855744421...d0afc166d1030.jpg https://www.antiquites-en-france.com/uploads/items/thumb_blank/a93e4412372005ad0...3052e44451739.jpg https://www.antiquites-en-france.com/uploads/items/thumb_blank/ba32b167c531f950a...d4c6cb74db787.jpg https://www.antiquites-en-france.com/uploads/items/thumb_blank/7abe06622512c144a...5cc710ac0c346.jpg https://www.antiquites-en-france.com/uploads/items/thumb_mini/42341b6c3f3382c69d...0f0eac872912b.jpg https://www.antiquites-en-france.com/uploads/items/thumb_mini/42c83d2e15bbefb492...c6ad509db07c3.jpg https://www.antiquites-en-france.com/uploads/items/thumb_mini/ff6cb0e3b14c24c153...cee31904f1762.jpg https://www.antiquites-en-france.com/uploads/items/thumb_mini/1f877ba455f604c5a4...9bc6ce62abbd3.jpg https://www.antiquites-en-france.com/uploads/magazine/14/thumb.jpg https://www.antiquites-en-france.com/uploads/magazine/6/thumb.jpg https://www.antiquites-en-france.com/uploads/magazine/5/thumb.jpg https://www.antiquites-en-france.com/displaydata/item_thumb_blank/a%3A18%3A%7Bi%...3Bi%3A18102%3B%7D https://www.googletagmanager.com/gtag/js?id=G-58XGFJWZ1E&cx=c&_slc=1 https://www.antiquites-en-france.com/favicon.png |
| Always compress text content (compressAssets) | The page has 13 requests that are served uncompressed. You could save a lot of bytes by sending them compressed instead. | 0 |
| Description: In the early days of the Internet there were browsers that didn't support compressing (gzipping) text content. They do now. Make sure you compress HTML, JSON, JavaScript, CSS and SVG. It will save bytes for the user; making the page load faster and use less bandwith. |
| Offenders: |
| Total image size shouldn't be too big (imageSize) | The page total image size is 1.4 MB. It's really big. Is the page using the right format for the images? Can they be lazy loaded? Are they compressed as good as they can be? Make them smaller by using https://imageoptim.com/. | 50 |
| Description: Avoid having too many large images on the page. The images will not affect the first paint of the page, but it will eat bandwidth for the user. |
| Total JavaScript size shouldn't be too big (javascriptSize) | The total JavaScript transfer size is 263.1 kB and the uncompressed size is 810.2 kB. This is quite large. | 0 |
| Description: A lot of JavaScript often means you are downloading more than you need. How complex is the page and what can the user do on the page? Do you use multiple JavaScript frameworks? |
| Offenders: |
| Don't use private headers on static content (privateAssets) | The page has 1 request with private headers. Make sure that the assets really should be private and only used by one user. Otherwise, make it cacheable for everyone. | 90 |
| Description: If you set private headers on content, that means that the content are specific for that user. Static content should be able to be cached and used by everyone. Avoid setting the cache header to private. |
| Offenders: https://www.googletagmanager.com/gtag/js?id=G-58XGFJWZ1E&cx=c&_slc=1 |
| Avoid missing and error requests (responseOk) | The page has 14 error responses. The page has 14 responses with code 404. | 0 |
| Description: Your page should never request assets that return a 400 or 500 error. These requests are never cached. If that happens something is broken. Please fix it. |
| Offenders: https://www.antiquites-en-france.com/css/all.min.css https://www.antiquites-en-france.com/galleria/galleriacustom.min.js https://www.antiquites-en-france.com/uploads/items/thumb_blank/0.jpg https://www.antiquites-en-france.com/uploads/items/thumb_blank/538a9e901933f4273...813324d8176c7.jpg https://www.antiquites-en-france.com/uploads/items/thumb_blank/593c63910b67fdb32...d315965855ba2.jpg https://www.antiquites-en-france.com/uploads/items/thumb_blank/a99b958bfae883cb2...b2a89637f7eb4.jpg https://www.antiquites-en-france.com/uploads/items/thumb_blank/b6541d9e44268d60c...591a917715801.jpg https://www.antiquites-en-france.com/uploads/items/thumb_blank/7180afd96ff1759d2...b8c2a90f9d2d4.jpg https://www.antiquites-en-france.com/uploads/items/thumb_blank/d36982a2b3fa39543...605c24e6680d3.jpg https://www.antiquites-en-france.com/uploads/items/thumb_mini/775a7a2b7aca65f82a...e0cc23b23de3b.jpg https://www.antiquites-en-france.com/display/member/19635/19635?rand=1131790051 https://www.antiquites-en-france.com/uploads/magazine/18/banner.jpg https://www.antiquites-en-france.com/uploads/magazine/10/thumb.jpg https://www.antiquites-en-france.com/uploads/items/thumb_blank/0.jpg |
0 s
0.5 sFirst Contentful Paint 416 msLCP <H1> 416 msFirst Visual Change 433 msVisual Complete 85% 433 msVisual Complete 95% 433 msHeading 433 msDOM Content Loaded Time 444 msLast Visual Change 466 msVisual Complete 99% 466 ms
