gistfile1.txt

for i in $(seq 1 10); do time ruby -e 'r=(1..10000).to_a.inject{|r,a| r*a}.to_s; for i in 0..(r.length/80).ceil do puts r[i*80, 80] end'; done > 1

real    0m0.627s
user    0m0.605s
sys     0m0.018s

real    0m0.623s
user    0m0.601s
sys     0m0.022s

real    0m0.625s
user    0m0.610s
sys     0m0.014s

real    0m0.622s
user    0m0.610s
sys     0m0.012s

real    0m0.624s
user    0m0.606s
sys     0m0.018s

real    0m0.622s
user    0m0.604s
sys     0m0.019s

real    0m0.622s
user    0m0.605s
sys     0m0.017s

real    0m0.623s
user    0m0.614s
sys     0m0.009s

real    0m0.623s
user    0m0.605s
sys     0m0.018s

real    0m0.623s
user    0m0.612s
sys     0m0.011s

$ for i in $(seq 1 10); do time ruby -e 'r=(1..20000).to_a.inject{|r,a| r*a}.to_s; for i in 0..(r.length/80).ceil do puts r[i*80, 80] end'; done > 2

real    0m2.804s
user    0m2.765s
sys     0m0.038s

real    0m2.800s
user    0m2.764s
sys     0m0.035s

real    0m2.802s
user    0m2.760s
sys     0m0.041s

real    0m2.799s
user    0m2.765s
sys     0m0.035s

real    0m2.807s
user    0m2.766s
sys     0m0.041s

real    0m2.799s
user    0m2.764s
sys     0m0.034s

real    0m2.802s
user    0m2.764s
sys     0m0.039s

real    0m2.799s
user    0m2.765s
sys     0m0.034s

real    0m2.806s
user    0m2.771s
sys     0m0.035s

real    0m2.800s
user    0m2.768s
sys     0m0.031s