Comparing with V9.0:
NuttX 9.0
$ arm-none-eabi-size nuttx
text data bss dec hex filename
68624 104 2496 71224 11638 nuttx
NuttShell (NSH) NuttX-9.0.0
nsh> free
total used free largest
Umem: 192976 7536 185440 125248
nsh>
------------------------------------------------------------------------------------------
NuttX 9.1 RC1
$ arm-none-eabi-size nuttx
text data bss dec hex filename
69468 104 2476 72048 11970 nuttx
NuttShell (NSH) NuttX-9.1.0
nsh> free
total used free largest
Umem: 192992 7536 185456 125264
nsh>
So the FLASH footprint still grew by about 800 bytes. If that trend
continues indefinitely it will be quite a large OS in the future.
Although that is still quite a lot is is more palatable than before.