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Tip of the Week: View Caching

Brad Wood July 10, 2012

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Brad Wood

July 10, 2012

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Do you have slow views whose output rarely or never changes? You can get an easy boost in performance by caching those views so they are not re-rendered on every request.

The following code shows two ways to cache the output from a view for a given number of minutes:
event.setView(name='home',cache=true,cacheTimeout=30);
#renderView(view='tags/footer',cache=true,cacheTimeout="60")#

Do you have dynamic portions of your view, or use a multilingual site? Use a cache suffix so ColdBox can cache each version of the view and always serve up the correct one.
event.setView(name='home',cache=true,cacheTimeout=30,cacheSuffix=rc.language);

Like control? The cacheTimeout sets how long the view is allowed to live in cache before it is expired. You can also set a cacheLastAccessTimeout to kick it out of the cache sooner if no one hits it within a given time frame. The following view will be cached for 2 hours, but will be evicted from the cache sooner if no one hits it for 20 minutes.
event.setView(name='contactUs', cache='true',cacheTimeout="120",cacheLastAccessTimeout="20");

P.S. To programmatically clear out a cached view on command use the following:
cachebox.getCache('template').clearView('general/index');

More info here: http://wiki.coldbox.org/wiki/Layouts-Views.cfm#View_Caching
 

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