> Please now try `if ! false; then echo true; fi`.
> Why does my shell eat muchos CPU & RAM after such a short pipeline?

[EMAIL PROTECTED] $ uname -a
OpenBSD idefix 3.9 GENERIC#617 i386
[EMAIL PROTECTED] $ /bin/ksh
$ date
Mon Aug 28 01:28:07 CEST 2006
$ if ! false; then echo true; fi
true
$ date                           
Mon Aug 28 01:28:12 CEST 2006
$ date; ( if ! false; then echo true; fi ); date
Mon Aug 28 01:28:20 CEST 2006
true
Mon Aug 28 01:28:20 CEST 2006
$ time ( if ! false; then echo true; fi )
true
    0m0.01s real     0m0.00s user     0m0.01s system
$ time ( echo `if ! false; then echo true; fi` )
true
    0m0.04s real     0m0.00s user     0m0.02s system
$ exit

Sorry, cannot reproduce.
Works for me (on OpenBSD 3.9-release).

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