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J. Nick Koston
680417941e
Cache struct lwip_sock* pointers at socket registration time instead of looking them up by fd on every iteration. The previous code stored file descriptors and called lwip_socket_dbg_get_socket(fd) on every loop iteration to convert each fd back to a pointer — only to read a single field from it. - register_socket(lwip_sock*) returns bool and hooks the callback internally — replaces the separate register_socket_fd + hook dance - Hot loop iterates struct lwip_sock* directly instead of converting fds each iteration - Socket::ready() uses the cached pointer instead of fd lookup - esphome_lwip_hook_socket() takes struct lwip_sock* directly - esphome_lwip_socket_has_data() moved to header as static inline for inlining — uses offset-based access verified by _Static_assert - Null cached_sock_ on close to prevent post-close dereference - socket_ready() tolerant of null pointer for safety
