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J. Nick Koston
64364961db
On ESP32, replace lwip_select() in yield_with_select_() with direct socket event reads via lwip_socket_dbg_get_socket(), reducing poll cost from 133us to ~7us (18.7x faster). Replace the UDP loopback wake socket with FreeRTOS task notifications (<2us, ISR-safe). Benchmarks (ESP32, 4 listen sockets): - Poll path: 7,087 ns vs 132,402 ns (18.7x faster) - Wake signal: 1,826 ns vs ~130,000 ns (72x faster, now ISR-safe) - Binary: yield_with_select_ 108B vs 188B (43% smaller) Non-ESP32 platforms (LibreTiny, ESP8266, RP2040) are unchanged.
