Relative speed of Bourne vs. C Shells - Korn is faster.

[Steve Langdon]

Rewriting the script to use ksh integer arithmetic (see below) adds the
following times.

    > Shell  -Amdahl 470 V/8-    ----Vax11/780---
    >          UTS/V (SVR2)           4.2 bsd
    >        User System Total   User System Total
    > csh    1.21  0.38   1.59    11     4    15
    >  sh    0.96  1.76   2.72    25   138   163
    > ksh    0.91  2.05   2.96    --    --    --
  new ksh    0.16  0.05   0.21    --    --    --


#!/bin/ksh
integer x=1
while (( $x < 100 )); do
	((x = $x + 1))
	if (( $x > 10 )); then
		echo Hi! $x
	fi
done
-- 
Stephen J. Langdon                  ...!{ihnp4,hplabs,sun,nsc}!amdahl!sjl

[ The article above is not an official statement from any organization
  in the known universe. ]