Here's the latest optimization to that func: https://github.com/php/php-src/commit/085b360abb622abc18b955a23cea12f752feea3d https://github.com/php/php-src/commi

Here's the latest optimization to that func: https://github.com/php/php-src/commit/085b360abb622abc18b955a23cea12f752feea3d https://github.com/php/php-src/commit/085b360abb622abc18b955... In the latest addendum on the blog post, I ended up removing the counting of 1s.