Dash for Android NDK

Dash NDK is a Dash compiled for Android, this is port from Debian Linux-based Dash.

What is Dash?

Dash (Debian Almquist shell) is a modern POSIX-compliant implementation of /bin/sh (sh, Bourne shell).
this is not Bash compatible, but Bash tries to be mostly compatible with POSIX, and thus Dash.

Dash shines in:

• Speed of execution. Roughly 4x times faster than Bash and others.
• Very limited resources (disk space, RAM or CPU).

  As minimalistic as possible - much smaller (134.1 kB vs 6.5 MB installed, 13 kSLOC vs 176 kSLOC) than Bash and others.

• Security. Dash is a long-established, tiny project with simple and long-established functionality; one that is still very much alive, and with many active developers. Thus, Dash has a much smaller attack surface, while still having many eyes on its code.
• If classic /bin/sh needed only.

How to use?

Download static binaries in Release Pages replace manually in system/bin according to ur ABI:
arm64v-8a/armeabi-v7a

Note

if ur devices using different ABI likes x86/RISC-V u cant use this.

then, open termux and type su -c dash or su then type dash:

Performance

the explanation at the beginning is just words, so how does it perform in real use-case?

• dash
• bash termux-based
• sh default

this is benchmark for Shell speed test by looping open-close 1000 times, then see which one is faster:

#!/system/bin/dash <-- /bin/bash for bash, /system/bin/sh for sh
for i in $(seq 1 1000);
do dash -c ":" ;
done

• dash: 2.28s
  
  
  
  
• bash: 21.01s
  
  
  
  
• sh: 2.80s
  
  
  
  

this proves that dash is very fast and can even compete with Android's built-in sh.
but, I don't recommend using this as a replacement for the default Shell (sh) :

for example by replacing with: cp dash /system/bin/sh

Source, etc.

Source: Here