unix - Trim last 3 characters of a line WITHOUT using sed, or perl, etc -

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i've got shell script outputting data this:

1234567890  * 1234567891  *

i need remove last 3 characters " *". know can via

(whatever) | sed 's/\(.*\).../\1/'

but don't want use sed speed purposes. same last 3 characters.

any quick way of cleaning output?

assuming data formatted example, use 'cut' first column only. 

cat $file | cut -d ' ' -f 1

or first 10 chars.

cat $file | cut -c 1-10

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