performance tweak
performance tweak

about 15%

kkkyyy03/scssphp,leafo/scssphp,dleffler/scssphp,dleffler/scssphp,webdevid/scssphp,g105b/scssphp,g105b/scssphp,webdevid/scssphp,g105b/scssphp,leafo/scssphp,dleffler/scssphp,guilhermeblanco/scssphp,guilhermeblanco/scssphp,leafo/scssphp,webdevid/scssphp