We ran a e-commerce site with custom domain (eg example.com), mapped with Domain Mapping plugin. SlideDeck2 slides are placed on home page.
Using tools.pingdom.com, i noticed lens.css and lens.js have longer wait time than other scripts. And they are served from the original domain (eg store1.wphost.org). It was found in slidedeck2/classes/slidedeck-lens.php, line 487, in get_meta function:
$lens_url = untrailingslashit( WP_PLUGIN_URL ) . str_repla...
The line is modified as:
$lens_url = plugins_url() . str_repla...
After which, both lens.js & lens.css are loaded from mapped domain (example.com).
Surprisingly, with the minor change, wait time of both lens files are reduced. Specifically, tests on tools.pingdom.com reduced by 0.5s-1s. This could be huge for slow, relative low-bandwidth servers.
i wonder if similar observation can be reproduced elsewhere.
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