With the following cmd_alias in the sudoers file, sudo is very slow.
1.6.9 changed from previous release that it search the entire file system to look for the commands.


Cmd_Alias SUDO_NOCRUN = ALL, \
!/*/visudo, !/*/*/visudo, !/*/*/*/visudo, !/*/*/*/*/visudo, \
!/*/vi *sudoers*, !/*/*/vi*sudoers*, !/*/*/*/vi *sudoers*, \
!/*/*/*/*/vi *sudoers*, \
!/*/su "", !/*/*/su "", !/*/*/*/su "", \
!/*/su -, !/*/*/su -, !/*/*/*/su-, \
!/*/su *root*, !/*/*/su *root*, !/*/*/*/su *root*, \
!/*/sh, !/*/*/sh, !/*/*/*/sh, \
!/*/ksh, !/*/*/ksh, !/*/*/*/ksh,\
!/*/zsh, !/*/*/zsh, !/*/*/*/zsh,\
!/*/tcsh, !/*/*/tcsh, !/*/*/*/tcsh \
!/*/csh, !/*/*/csh, !/*/*/*/csh \
!/*/nsh, !/*/*/nsh, !/*/*/*/nsh