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J. Nick Koston
b8de93aabe
Move the api_is_connected() definition from util.cpp to util.h and mark it ESPHOME_ALWAYS_INLINE. The body is trivial — a nullptr check on global_api_server plus APIServer::is_connected() (which is !clients_.empty()) — so the out-of-line call8 was pure overhead for hot paths that check connectivity every loop tick (e.g. zwave_proxy::loop, serial_proxy::loop). With USE_API disabled the function collapses to "return false" at compile time and folds away entirely. util.h now pulls in api_server.h under USE_API. Only 25 .cpp files include util.h and all of them are on USE_API builds in practice (wifi, safe_mode, nextion, web_server, etc.), so the additional transitive include is essentially free on the platforms that matter. Measured on ESP32-S3: the call8 in ZWaveProxy::loop() is replaced by 5 inline Xtensa instructions (load global_api_server, deref, null check, clients_ start/finish compare) — no call overhead, no stack frame.
