Autoptimize

Relying on a series of recommended industry standards for making content more SEO and user friendly, Autoptimize allows a webmaster to improve various facets of his site like speed and compilation time without actually affecting the frontend or the UI.

Autoptimize comes with its own settings page in the WP backend where various operations can be turned on or off based on your preferences.

If you like Autoptimize, be aware it also works better in conjunction with a caching plugin.

Installation:

Unpack and upload it to the /wp-content/plugins/ directory.
Activate the plugin through the 'Plugins' menu in WordPress.

What is new in this release:

• "Inline and defer CSS" allows one to specify which "above the fold CSS" should be inlined, while the normal optimized CSS is deferred.
• Inlined Base64-encoded background Images will now be cached as well and the threshold for inlining these images has been bumped up to 4096 bytes (from 2560).
• Separate cache-directories for CSS and JS in /wp-content/cache/autoptimize, which should result in faster cache pruning (and in some cases possibly faster serving of individual aggregated files).
• CSS is now added before the -tag, JS before (and after when forced in head). This can be overridden in the API.
• Some usability improvements of the administration-page
• Multiple hooks added to the API a.o. filters to not aggregate inline CSS or JS and filters to aggregate but not minify CSS or JS.

What is new in version 1.9.2:

• "Inline and defer CSS" allows one to specify which "above the fold CSS" should be inlined, while the normal optimized CSS is deferred.
• Inlined Base64-encoded background Images will now be cached as well and the threshold for inlining these images has been bumped up to 4096 bytes (from 2560).
• Separate cache-directories for CSS and JS in /wp-content/cache/autoptimize, which should result in faster cache pruning (and in some cases possibly faster serving of individual aggregated files).
• CSS is now added before the -tag, JS before (and after when forced in head). This can be overridden in the API.
• Some usability improvements of the administration-page
• Multiple hooks added to the API a.o. filters to not aggregate inline CSS or JS and filters to aggregate but not minify CSS or JS.

What is new in version 1.8.4:

• Bugfix:
• Code in inline JS (or CSS) can be wrapped inside HTML-comments.

What is new in version 1.8.2:

• Improvement:
• More graceful failure when minifier classes exist but method does not.
• Deferred CSS is also outputted in noscript-tags.
• Differentiate between Apache version in .htaccess file.
• Also aggregate protocol-less CSS/JS URI's.
• Disable autoptimization based on parameter in querystring (for debugging).
• Bugfix:
• Some CSS-imports were not being aggregated/ minified.
• Added CSS before to avoid breakage when title includes other attributes.
• Make sure javascript or css between comments is not aggregated.

What is new in version 1.7.0:

• New: exclude CSS
• New: defer CSS
• Updated minimizing components (JSMin & YUI PHP CSSMin)
• Updated admin-page, hiding advanced configuration options
• Updated CDN-support for added simplicity (code & UI-wise), including changing background image url in CSS

What is new in version 1.6.3:

• Fix not to strip out comments in HTML needed by WP Super Cache or W3 Total Cache (e.g. mfunc).
• Added check to clean cache on upgrade.
• Updated FAQ in readme with information on troubleshooting and support.
• Tested with WordPress 3.6 beta.

What is new in version 1.6.0:

• Added support for ETag and LastModified (essentially for a better pagespeed score, as the files are explicitely cacheable for 1 year)
• Autoptimizing for logged in users is enabled again
• Autoptimize now creates an index.html in wp-content/cache/autoptimize to prevent snooping

What is new in version 1.3:

• Add workaround for TinyMCEComments.
• Add workaround for asynchronous Google Analytics.

What is new in version 1.0:

• Add workaround for whos.among.us
• Support preserving HTML Comments.
• Implement "delayed cache compression"
• French translation
• Update Spanish translation

Requirements:

• WordPress 2.7 or higher