New book on WordPress Theme Development: WordPress Themes In Depth
cache
Tag Archive

Better Image Caching with CSS

I have written previously on the fine art of preloading images without JavaScript using only CSS. These caching techniques have evolved in terms of effectiveness and accuracy, but may be improved further to allow for greater cross-browser functionality. In this post, I share a “CSS-only” preloading method that works better under a broader set of conditions. Previous image-preloading techniques target all browsers, devices, and media types. Unfortunately, certain browsers do not load images that are hidden directly (via the <img /> element) or indirectly (e.g., via the parent <div></div> element) using either display:none; or visibility:hidden;. Further problematic is the potential […] Read more »

Preventing the Unpredictable White Screen of Death for WordPress Sites with Multiple Themes

For the past several months and up until just recently, Perishable Press had been suffering from unpredictable episodes of the dreaded white screen of death. Although blank white screens happen to virtually all WordPress users now and then, certain configurations seem to trigger crashes more frequently than others. Here, I am referring to WordPress version 2.3. In this case, the unpredictable crashes, inconsistent errors, and general instability began several months ago after I had completed my WordPress theme restoration project. Prior to that, I had removed all of my alternate themes and placed them on a subdomain. Meanwhile, after the […] Read more »

How to Cache Mint JavaScript

NOTE: This post was written many months ago under the erroneous assumption that caching Mint’s JavaScript was a good idea (for Y-Slow compliance, performance, et al); however, after a brief chat with the man himself, Shaun Inman, I was quickly informed that this was a bad idea: caching Mint JavaScript files will cause Mint to stop functioning. But, for what it’s worth, and for the sake of retaining potentially useful information, I present the original article here for your amusement.. Recently, I spent some time addressing a few of the performance issues pointed out by Yahoo!’s very useful YSlow extension […] Read more »

Improve Site Performance by Increasing PHP Memory for WordPress

During the recent ASO server debacle, I raced frantically to restore functionality to Perishable Press. Along the way, one of the many tricks that I tried while trying to fix the dreaded “white screen of death” syndrome involved increasing the amount of PHP memory available to WordPress. This fix worked for me, but may not prove effective on every installation of WordPress. If you are unsure as to whether or not you need to increase your PHP memory, consult with your host concerning current available memory 1 and overall compatibility with a localized increase. Note that if your blog is running […] Read more »

WordPress Error Fix(?): Increase PHP Memory for cache.php

This trick isn’t guaranteed to prevent all WordPress-generated PHP memory errors, but it certainly seems to help reduce their overall occurrence. For some reason, after my host upgraded their servers to Apache 1.3.41, I began logging an extremely high number of fatal PHP “memory exhausted” errors resulting from the WordPress cache.php script. Here is an example of the countless errors that are generated: Read more »

How to Enable the Default WordPress Object Cache

Recently, while attempting to optimize site performance, I found myself experimenting with various caching mechanisms currently available for WordPress. Specifically, I explored each of the following caching options: WP-Cache 2 [WordPress plugin] (404 link removed 2012/08/10) WP Super Cache [WordPress plugin] WordPress Object Cache [built-in caching mechanism] While working with the two plugins, WP Cache 2 and Super Cache, I was pleased to discover crystal-clear instructions on each their respective sites. Having access to installation and usage information greatly facilitated the implementation of each of these caching techniques. On the other hand, finding information about the default WordPress object cache […] Read more »

Latest Tweets USP Pro v1.9 now available, many great new features: plugin-planet.com/usp-pro-vers… #wordpress #plugin