weissersand In addition to https://community.devsense.com/d/2438-highligt-compiler-optimized-functions : native PHP functions, classes, constants (but not: magical constants, language constructs) might be called with backslash. See https://www.deviaene.eu/articles/2023/why-prefix-php-functions-calls-with-backslash/ for better explanation and performance difference. E.g. inside a method: \curl_share_init_persistent([\CURL_LOCK_DATA_DNS, \CURL_LOCK_DATA_CONNECT]);
JakubMisek weissersand , thank you for the suggestion. What would you highlight in the code below? \curl_share_init_persistent([\CURL_LOCK_DATA_DNS, \CURL_LOCK_DATA_CONNECT]);