5/20/2023 0 Comments Multibrowser cachewould return the employee if found for this test, assume failĪnd here is the output to the test program. simulates a delay due to remote database access, for example Time2.Subtract( time1 ), time3.Subtract( time2 ) ) using System Ĭonsole.WriteLine( "Accessing CEO for the first time." ) Ĭonsole.WriteLine( "Accessing cached CEO.n" ) Ĭonsole.WriteLine( "Time accessing CEO object:nNotCached.", For simplicity, the GetEmployee method simply sleeps for 2 seconds to simulate a delay loading the object from a remote database. Using this example, here is a console test program that demonstrates how an object cache can really save time on multiple accesses. This ensures that we are truly checking for our special s_EmployeeNotFound object and prevents any accidental equality from an overridden Equals method in the Employee object. Note the use of Object.ReferenceEquals to compare objects. If ( Object.ReferenceEquals( ceo, s_EmployeeNotFound ) ) Static private Employee s_EmployeeNotFound = new Employee() If the CEO object could not be retrieved, instead of leaving the cached m_CEO reference as null, we set it equal to the s_EmployeeNotFound reference to indicate that we’ve already tried to load the CEO, so don’t bother doing it again. As shown below, the Employee object stored in the s_EmployeeNotFound static member will serve as a “flag” to indicate that we’ve already attempted to get the CEO object but failed, hence do not attempt to get it again. The solution is to create a blank Employee object and save it in a static member. But what if the CEO object cannot be found? As written above, the CEO property will call the GetEmployee method every time, resulting in a significant performance penalty. This.m_CEO = this.GetEmployee( Roles.CEO ) The easiest way to do this is simply include a private member that holds the CEO object once it has been loaded: private Employee m_CEO To improve performance, let’s say we want to cache the Employee object returned by the CEO property so that it can be accessed repeatedly with no delay after the first access. Public Employee GetEmployee( Roles role ) There is also a CEO property that returns the Employee object representing the company’s CEO: public class Company Consider a “Company” object that has a GetEmployee method which retrieves an Employee object from a remote database, an operation that could take a few seconds. But what if the object cannot be found? You have to take special care to ensure the object is not fetched repeatedly.Īs always, the best way to demonstrate this is with an example. I appreciate the email from Dave which is why i’ve written this post on how to test your WordPress site displays correctly in multiple browsers.For performance efficiency, you may wish to cache an object within another object. I then reactivated each plugin one by one until i found the plugin causing the problem. The way i pin pointed the problem was by bulk deactivating all plugins including my caching plugin and then clearing the browser cache. Update: I actually worked out the problem was caused by a new plugin i had installed recently which includes css. My site seems to be displaying correctly now in Internet Explorer 8, however i have posted the issue in the Woo theme forum and will report back if there’s anything further to add which can prevent the problem from happening again. One of my readers emailed me recently with a screenshot showing how my site was was messed up in I.E 8. Here’s a screenshot of how easy it is to test cross browser compatibility using Adobe browser labs. You have to create an account with them but the Adobe tools are really nice to use and i actually enjoyed using these tools. Personally, i found the Adobe browser labs tool really nice to use. If you’re always making small changes to your site, here’s some of the best tools which will save you time when cross browser testing: There’s many different reasons your site might not display correctly in one or more particular browsers but the main point is to test your site using a tool which can test them all quickly & easily rather than install all the browsers on your local computer. This is especially true if you’re constantly adding, editing and/or making changes to your site using css and plugins. There’s so many different versions of different browsers these days that its hard to know if your site displays correctly in all of them.
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