k9 comes with a few system functions and measurement commands. The commands allow you to load a script, change the working directory, measure execution times and memory usage, and list defined variables.
Load a text file of k9 commands. The file name must end in .k.
\l func.k \l func.k \l func.k7 / will error as not .k :nyi
List time elapsed
\t ^(_1e7)?_1e8 227
a:1;b:2;c:3 \v [v:`a`b`c]
List memory usage
\w 0 r:(`i$10e6)?10 \w 2097158
Change directory (cd) into x