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J. Nick Koston
807e786fac
Replace the virtual Socket base class with compile-time type aliases. Since only one socket implementation is active per build (selected via #ifdef), virtual dispatch was unnecessary overhead. Each implementation (BSDSocketImpl, LwIPSocketImpl, LWIPRawImpl) is now a concrete class in its own header with no virtual methods. socket::Socket and socket::ListenSocket are type aliases to the active implementation. For LWIP_TCP (ESP8266/RP2040), the listen socket is a separate type (LWIPRawListenImpl) sharing a non-virtual LWIPRawCommon base with the connected socket type (LWIPRawImpl). On BSD/LWIP_SOCKETS, both aliases resolve to the same type. This eliminates all vtable overhead, virtual destructors, and indirect call overhead across all platforms. Co-Authored-By: J. Nick Koston <nick@koston.org>
