Ina status report "requirement" for Twig C extension for PHP was added. However, the wording exceeds expectations.
The justification to introducing this check was based on a) a post from 2011 on why we needed to have a C extension to speed up the slow and already-improved PHP Twig_Template::getAttribute function and b) a 2013 article which claimed we could get a perf increase of ~15%...but that was with PHP 5.3. We're now requiring 5.5.9 at a minimum, and benchmarks show PHP 7 greatly improves overall PHP performances.
https://github.com/twigphp/Twig/issues/1695 also discusses porting the Twig C extension to PHP 7 but it's unclear at this point if it'll ever happen. Solid benchmarking is required to determine if PHP 7 improvements are making the Twig C extension obsolete or if it's still something we should consider recommending. In doubt, we should no longer recommend it on the reports page and thus prevent confusion from arising as a result.
Remove the requirement altogether.
None. Patch is trivial and has been written already.
User interface changes
Reports page no longer shows a requirement for the Twig C extension.
Data model changes