Performance improvements (+4% to speed in Magento2)

[andrey-legayev]

Hi,

I've run xdebug profiler for Magento2 static content deploy and found huge amount of calls to in_array()
I've tried to optimize it and got ~4% performance improvement.

Pls review my changes.

Andrey

[andrey-legayev]

It looks like travis config is outdated... PHP versions are not supported anymore

[andrey-legayev]

Travis conf updated. All unit tests are passed.

[hostep]

@andrey-legayev: great job!

However, Magento2 is no longer going to use this original less.php library, they'll be moving to a different fork: https://github.com/wikimedia/less.php/ in Magento 2.3.3 and higher (see magento/magento2@9a4332c).
That last one is better maintained then this original fork and has support for PHP 7.3 which Magento 2.3.3 needs.

So you'd best also send the same PR to the wikimedia fork :)

[andrey-legayev]

Thanks, I'll check it out

[andrey-legayev]

Submitted to Wikimedia fork: wikimedia#14