printPrefetchHints is a plugin that improves Zenphoto image browsing performance by printing link prefetching hints which instruct Mozilla-based browsers to preload the next page and image in the album.
Link prefetching hints are only supported by Mozilla-based browsers. The hints are completely harmless as they are ignored by other browsers like Internet Explorer. You can test your browser to see if it supports prefetching.
Example Usage:
Insert in the <HEAD> section of your theme’s image.php:
include_once('print_prefetch_hints.php');
printPrefetchHints();You may pass an optional parameter to printPrefetchHints() to use an image size other than the default image size in your Zenphoto settings.
How it works:
Link prefetching is a browser mechanism, which utilizes browser idle time to download or prefetch documents that the user might visit in the near future. A web page provides a set of prefetching hints to the browser, and after the browser is finished loading the page, it begins silently prefetching specified documents and stores them in its cache. When the user visits one of the prefetched documents, it can be served up quickly out of the browser’s cache.
Please read the Link prefetching FAQ for more information on this mechanism.
Performance:
From my rudimentary profiling, this plugin generally takes less than 10 milliseconds to execute on my shared hosting service.
Download:
zenphoto_print_prefetch_hints.zip
Changelog:
November 29, 2007
