gawk i=10 join

real	0m0.050s
user	0m0.043s
sys	0m0.007s

gawk i=10 xjoin

real	0m0.073s
user	0m0.063s
sys	0m0.010s

gawk i=11 join

real	0m0.146s
user	0m0.122s
sys	0m0.023s

gawk i=11 xjoin

real	0m0.194s
user	0m0.170s
sys	0m0.024s

gawk i=12 join

real	0m0.367s
user	0m0.316s
sys	0m0.050s

gawk i=12 xjoin

real	0m0.608s
user	0m0.566s
sys	0m0.040s

gawk i=13 join

real	0m0.949s
user	0m0.819s
sys	0m0.127s

gawk i=13 xjoin

real	0m1.305s
user	0m1.139s
sys	0m0.163s

gawk i=14 join

real	0m3.032s
user	0m2.628s
sys	0m0.395s

gawk i=14 xjoin

real	0m4.393s
user	0m3.953s
sys	0m0.432s

dawk i=10 join

real	0m0.019s
user	0m0.015s
sys	0m0.004s

dawk i=10 xjoin

real	0m0.025s
user	0m0.026s
sys	0m0.000s

dawk i=11 join

real	0m0.039s
user	0m0.035s
sys	0m0.003s

dawk i=11 xjoin

real	0m0.061s
user	0m0.057s
sys	0m0.003s

dawk i=12 join

real	0m0.098s
user	0m0.094s
sys	0m0.003s

dawk i=12 xjoin

real	0m0.175s
user	0m0.154s
sys	0m0.020s

dawk i=13 join

real	0m0.294s
user	0m0.281s
sys	0m0.013s

dawk i=13 xjoin

real	0m0.512s
user	0m0.481s
sys	0m0.030s

dawk i=14 join

real	0m0.895s
user	0m0.846s
sys	0m0.047s

dawk i=14 xjoin

real	0m1.500s
user	0m1.369s
sys	0m0.127s

mawk i=10 join

real	0m0.597s
user	0m0.486s
sys	0m0.110s

mawk i=10 xjoin

real	0m0.030s
user	0m0.024s
sys	0m0.007s

mawk i=11 join

real	0m6.784s
user	0m5.037s
sys	0m1.728s

mawk i=11 xjoin

real	0m0.069s
user	0m0.062s
sys	0m0.007s

mawk i=12 join

real	1m14.726s
user	1m0.822s
sys	0m13.715s

mawk i=12 xjoin

real	0m0.254s
user	0m0.236s
sys	0m0.017s

mawk i=13 join
^C