! --------
: euler017 ( -- answer )
- 1000 [1,b] SBUF" " clone [ number>text over push-all ] reduce [ Letter? ] count ;
+ 1000 [1,b] SBUF" " clone [ number>text append! ] reduce [ Letter? ] count ;
! [ euler017 ] 100 ave-time
! 15 ms ave run time - 1.71 SD (100 trials)