for x in [1024 512 256 128 64 32 16 8 4 2] {
let filename = 'const_Nm_timings.csv';
$x | into string | save --append $filename;
", " | save --append $filename;
let m = 2048000000 / $x;
time -f %e -a -o  $filename ./memleak $x $m;
};