I just ask dim to display its version under the different shells. In
ksh93, the script is modified dynamically before execution, but it is
not even the slowest version :-)
mv42:work2/dim> time bash dim -V
dim-0.4.9-mv3 Linux 2.6.25.4 i686 bash 3.1.17(2)-release
real 0m0.06s
user 0m0.06s
sys 0m0.00s
mv42:work2/dim> time ksh dim -V
dim-0.4.9-mv3 Linux 2.6.25.4 i686 ksh93 Version M 1993-12-28 s+
real 0m0.04s
user 0m0.04s
sys 0m0.01s
mv42:work2/dim> time zsh dim -V
dim-0.4.9-mv1.0.17 Linux 2.6.25.4 i686 zsh 4.3.6
real 0m0.04s
user 0m0.03s
sys 0m0.01s
mv42:work2/dim> time ash dim -V
dim-0.4.9-mv3 Linux 2.6.25.4 i686 sh ash/BSD
real 0m0.02s
user 0m0.02s
sys 0m0.00s
Conclusion: ash the fastest to run, bash the slowest, ksh93 and zsh in
the middle.
Marc
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