How does f5 refresh work

The use of how content is pulled from cache on repeat visits is impacted by the manner in which the request is issued. While in the same browser session, all content for a site will be served from the local browser cache.

If a user clicks through multiple pages of an application and the same graphics and elements are found on each page, the request will not be sent to the origin web server. Instead it will be served from the local cache. If the user re-visits a page during that session, all of the content—including the HTML—will be retrieved from the local cache, as shown in the image below depending on the browser settings.

As soon as the browser is closed, the session cache is cleared. For the next session, the only cache that will be used is the disk cache. Users might also hit refresh on a page to check for new content, such as an updated sports score or news article. Hitting refresh results in an "If-None-Match" header being sent to the origin web server for all content that is currently on the disk cache, independent of the expiration date of the cached content.

This results in a response code for each reusable item that is currently in the browser's cache, as illustrated in the picture below. All objects will contain a response code of , indicating that all were served directly from the servers as in the illustration below. If a new browser session is started and a user returns to a frequently visited site, the local browser cache will be used based on the browser settings. If a valid expiration date exists for cached content, it will be delivered directly from the cache and no request will be issued to the origin web server.

If content does not have a valid expiration date, the browser will insert an "If-modified-since" or "If-none-match" header into the request. If the content has not changed, then a will be returned from the server and the content will be retrieved from cache. On the other hand, if the content has changed, the server will respond with a and deliver the content to the user.

By using these settings, the user will get the most benefits from the Intelligent Browser Referencing features of WebAccelerator. If static content contains random query parameters to prevent caching an iRule can be used to remove these random parameters and enable caching. The use of META tags will potentially negate the end user benefits of acceleration.

META tags can be eliminated through the use of iRules or custom rewrite scripts. To see the differences of the application with and without acceleration, a new browser session must be initiated; the other three ways of loading a page on repeat visits will show no differences with or without acceleration. Eliminating the need for the browser to download content on repeat visits can greatly improve the performance of web applications.

There are many factors that impact whether or not content can or will be retrieved from the local browser cache on repeat visits, including the browser settings, the web site, and the user's behavior.

What happens when we hit refresh on a web page? Once a request is made to the server from thebrowser the page is processed. Even if the user cancels orstops the request, the server continues to process the request.

Simply, the page the user is seeing is lost unless insession, they can not pick it up again. Gleva Oettinger Supporter. What is contained in the browser cache? The browser cache is a temporary storage locationon your computer for files downloaded by your browser todisplay websites. Files that are cached locally include anydocuments that make up a website, such as html files, CSS stylesheets, JavaScript scripts, as well as graphic images and othermultimedia content. Gurutz Babut Beginner.

What is empty cache and hard reload? In the case of a Hard Reload , the browser doesnot use anything in the cache and is forced to re-downloadeverything. When you select Empty Cache and HardReload , it will empty the cache first and thenre-download everything.

Delaine Stimpfle Beginner. How do you reset Google Chrome? Reset Google Chrome. Click the menu icon next to the address bar. Select Settings from the drop-down menu. Scroll to the bottom of the Settings page and click theAdvanced link. Scroll to the bottom of the expanded page and click the Resetbutton. Click the Reset button in the pop-up window. Tora Zeleznikov Beginner. How do you refresh cache in Chrome? In Chrome. On your computer, open Chrome.

At the top right, click More. Click More tools Clear browsing data. At the top, choose a time range. To delete everything, selectAll time.

Next to "Cookies and other site data" and "Cached images andfiles," check the boxes. Click Clear data. Charisse Witthaut Beginner. What is the difference between Ctrl f5 and f5? F5 and the refresh button will look at yourbrowser cache before asking the server for content.

Unlike with F5 , aforced reload does not display a cached copy of thepage. Ask A Question. Co-authors: 7. In the same way that your web browser has a cache of recent web pages, your Internet Service Provider ISP may be doing some caching on your behalf. In some rare cases, even though you are using shift-refresh to get new data from a webpage, the pages still seem to be old. This may be because your Internet Service Provider also has a cache and their cache may not be set up quite right, and they are not downloading the latest web pages.

Home Cache? Cache test?