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J. Nick Koston
8fbf102ef3
On ESPHOME_THREAD_SINGLE platforms (ESP8266), move the Millis64Impl::compute() body into the header so it can be inlined at call sites. The function is trivial: two static loads, a rollover branch (taken every ~49.7 days), a store, and a shift+add. The static storage (last_millis_, millis_major_) is declared as class statics in the header and defined in time_64.cpp so all TUs share one copy. Multi-threaded paths remain out-of-line in time_64.cpp. Also force-inline millis_64_from_() which wraps compute() — GCC was creating an $isra$ clone instead of inlining the wrapper. Verified on ESP8266 (xtensa-lx106): - Millis64Impl::compute() and millis_64_from_ symbols eliminated - Scheduler::call() idle path: zero out-of-line calls (was 1) - compute body inlined into 3 call sites (Scheduler::call, next_schedule_in, loop/millis_64)
