How to get the time cost of functions?

Shell Programming and Scripting
1

hi,
There is a shell including many functions, when I run ksh -x/-v to see the call sequence, but how do I know which function cost more?
Of course, use time CMD to get the scripts runnning time, while it can not tell me which cost more.
Thanks very much.

2

Well, you could do something like this:

if [ $TIME ]; then 
  PREFIX=time
else
  PREFIX=""
fi

$PREFIX myfunc arg1 arg2 arg3

$PREFIX myfunc2 arg1 arg2 arg3 | $PREFIX myfunc3 arg1