[UPDATE 29/03/2018: Autoptimize 2.4 can now be downloaded from https://github.com/futtta/autoptimize/archive/beta.zip and will automatically update so ensure all new functionality and fixes are applied]
TL;DR Autoptimize 2.4 will be a major change. Tomaš Trkulja (aka zytzagoo) has cleaned up and modernized the code significantly, making it easier to read and maintain, switched to the latest and greatest minifiers and added automated testing. And as if that isn’t enough we’re also adding new optimization options! The downside: we will be dropping support for PHP < 5.3 and for the “legacy minifiers”. AO 2.4 will first be made available as a separate “Autoptimize Beta” plugin
on wordpress.org via GitHub and will see more releases/ iterations with new options/ optimizations there before being promoted to the official “Autoptimize”.
Back in March 2015 zytzagoo forked Autoptimize, rewriting the CDN-replacement logic (and a lot of autoptimizeStyles::minify really) and started adding automated testing. I kept an eye on the fork and later that year I contacted Tomas via Github to see how we could collaborate. We have been in touch ever since; some of his improvements have already been integrated and he is my go-to man to discuss coding best practices, bugfixes and security.
FFWD to the nearby future; Autoptimize 2.4 will be based on Tomaš’ fork and will include the following major changes:
- New: option only minify JS/ CSS without combining them
- New: excluded JS- or CSS-files will be automatically minified
- Improvement: switching to the current version of JSMin and -more importantly- of YUI CSS compressor PHP port which has some major performance-improvements of itself
- Improvement: all create_function() instances have been replaced by anonymous functions (PHP 7.2 started issuing warnings about create_function being deprecated)
- Improvement: all code in autoptimize/classlesses/* (my stuff) has been rewritten into OOP and is now in autoptimize/classes/*
- Improvement: use of autoload instead of manual conditional includes
- Improvement: a nice amount of test cases (although no 100% coverage yet), allowing for Travis continuous integration-tests being done
- dropping support for PHP below 5.3 (you really should be on PHP 7.x, it is way faster)
- dropping support for the legacy minifiers
These improvements will be released in a separate “Autoptimize Beta” plugin soon (albeit not on wordpress.org as “beta”-plugins are not allowed). You can already download from GitHub here. We will start adding additional optimization options there, releasing at a higher pace. The goal is to create a healthy Beta-user pool allowing us to move code from AO Beta to AO proper with more confidence. So what new optimization options would you like to see added to Autoptimize 2.4 and beyond? :-)
[corrected 19/02; wordpress.org does not allow beta-plugins]