Duane Parker had the time down to 23 seconds using Forth in his January classic on benchmarking with Pascal, QL-SuperBasic, etc.
The Small-C QL combo does it in 16 seconds (14 with Lightning installed). An IBM PS/2-30 and the same (well, nearly the same) source code using Turbo-C took 6 Seconds. Mix-C & IBM did it in 5. A Toshiba T5200/100 & Turbo-C took 2 seconds.
When ported over to the VAX-8650 and timed it came back as 0.0 seconds, so I extended the run down to 1; then it took 0.2 seconds.