gawk crushing busybox awk

gistfile1.txt

root@apu:~# time awk 'BEGIN { OFMT = "%.0f"; for (i = 0; i < 50000; i++) print (95/100 * 42) }' > /dev/null

real	0m0.517s
user	0m0.435s
sys	0m0.081s
root@apu:~# time awk 'BEGIN { for (i = 0; i < 50000; i++) printf("%.0f\n", (95/100 * 42)) }' > /dev/null

real	0m0.862s
user	0m0.624s
sys	0m0.237s

root@apu:~# time gawk 'BEGIN { OFMT = "%.0f"; for (i = 0; i < 50000; i++) print (95/100 * 42) }' > /dev/null

real	0m0.076s
user	0m0.075s
sys	0m0.001s
root@apu:~# time gawk 'BEGIN { for (i = 0; i < 50000; i++) printf("%.0f\n", (95/100 * 42)) }' > /dev/null

real	0m0.430s
user	0m0.429s
sys	0m0.000s