Atmega328 like sleep with ESP8266/ESP32

Is there a sleep mode in ESP8266/ESP32 like the one in Atmega328?

1)sleep/halt the cpu
2)wakeup with watchdog timer or any hardware timer
3)Resume operation from where the CPU was before sleeping

All I understand is that wakeup on these MCUs resets the CPU which slows the wakeup, all the libraries and peripherals attached need to be re-initialised.

Really, there is no real sleep/resume?

Thanks and Regards,
WI

You do realize that the ESP32 has 3 cores?

Core0, Core1, and ULP (Ultra Low Power). The ULP core has its own RAM and program storage space. Try doing a search on the internet on the words "ESP32 ULP code".

What I tend to do is to read about a device and look over its spec sheet before buying the device.

As per this link
https://github.com/espressif/esp-iot-solution/blob/master/documents/DFS_and_light_sleep/light_sleep_performance_en.md,

light sleep halts the CPU and saves the RAM contents too. Upon wake-up, the CPU resumes from where it left. Current consumption, while not very good, is still quite decent @ 0.79mA during sleep with timer as a wake up source. Can it be used in Arduino loop() ?