keystats

#!/usr/bin/perl

use strict;

use FindBin;

sub usage {
  print "usage: keystats [-v] keyfile\n";
  print "usage: keystats [-p <pct> [-v]] keyfile\n";
  exit -1;
}

usage if ((@ARGV == 0) or ($ARGV[0] eq '-h'));

my @exes = glob "'$FindBin::Bin/keystat.???'";

my %stats;
for my $exe (@exes) {
    $exe =~ s/\ /\\ /g;
    $stats{$exe} = `$exe @ARGV`;
    delete $stats{$exe} if ($? != 0); # omit hash functions that fail to produce stats (nx)
}

print( "fcn  ideal%     #items   #buckets  dup%  fl   add_usec  find_usec  del-all usec\n");
printf("---  ------ ---------- ---------- -----  -- ---------- ----------  ------------\n");
for my $exe (sort statsort keys %stats) {
    my ($ideal,$items,$bkts,$dups,$ok,$add,$find,$del) = split /,/, $stats{$exe};

    # convert 0-1 values to percentages
    $dups = $items ? (100.0 * $dups / $items) : 0.0;
    $ideal = 100.0 * $ideal;

    printf("%3s  %5.1f%% %10d %10d %4.0f%%  %2s %10d %10d  %12d\n", substr($exe,-3,3),
        $ideal,$items,$bkts,$dups,$ok,$add,$find,$del);
}

# sort on hash_q (desc) then by find_usec (asc)
sub statsort {
    my @a_stats = split /,/, $stats{$a};
    my @b_stats = split /,/, $stats{$b};
    return ($b_stats[0] <=> $a_stats[0]) || ($a_stats[-1] <=> $b_stats[-1]);
}