[Tobias] had the same thought and redesigned the standard ESP32 “NodeMCU” style devboard ... socket has been swapped for sleek modern USB-C. You have cables for that common standard now ...
In terms of standard benchmarks for microcontrollers and other embedded devices, CoreMark is probably the go-to. And we found that it had been already ported to the ESP8266 and ESP32 by [Ochrin].