For context of how lightweight this is, an -O3 release build of my
entire firmware on the management processor right now (including the sshd, hardware drivers, TCP/IP stack, the CLI itself, all of the code to query the supported set of sensors, etc) uses 109 kB of flash and 84 kB of SRAM. The -Og debug build is smaller at 86 kB flash usage.
It compiles in five seconds from a clean build tree on my workstation.
Sure, this isn't as feature-rich as OpenSSH or even Dropbear and is missing a lot of the fancy features you get on Linux, but it's tiny and fast. Good luck getting buildroot or something to give you a 100 kB kernel+userspace image that builds in five seconds.
And it's fast: "time -p ssh testbed show ver" returns in 70 ms on a debug build. That's faster than some x86 Debian + OpenSSH machines I've benchmarked against. And I'm on a 500 MHz single-core Cortex-M7.
It compiles in five seconds from a clean build tree on my workstation.
Sure, this isn't as feature-rich as OpenSSH or even Dropbear and is missing a lot of the fancy features you get on Linux, but it's tiny and fast. Good luck getting buildroot or something to give you a 100 kB kernel+userspace image that builds in five seconds.
And it's fast: "time -p ssh testbed show ver" returns in 70 ms on a debug build. That's faster than some x86 Debian + OpenSSH machines I've benchmarked against. And I'm on a 500 MHz single-core Cortex-M7.