DietPi

Link

https://dietpi.com/

Excerpt

Highly optimised minimal Debian [OS](…/Operating systems/)

DietPi is extremely lightweight at its core, with features of low process/memory footprint and DietPi-RAMlog installed by default, to get the maximum performance from your device.

Notes

• [OS](…/Operating systems/) optimized for Single Board Controllers such as [Raspberry Pi](…/Raspberry Pi/)