I am again here for the Perl wisdom. Following script is miserably slow on big data. I am looking for a SMART/aternative way to achieve the same with speed !!

raaaammmmmaaaaaj -> ra3m4a4j and vice versa

use strict;
use warnings;

my @char;
while (<DATA>) {
@char = split //;
}

comp(\@char);
#---------------------
my $com= "r0a3m4a4j0";
my @com = split //, $com;
dcomp (\@com);

#dcomp sub here
sub dcomp {
my ($com_ref)=@_;
my @com=@$com_ref;
my $car;
for (my $aa=0; $aa<=$#com; $aa++) {
    if ($com[$aa]!~ /\D/) { print "$car" x ($com[$aa]);} else {print "
+$com[$aa]"; $car = "$com[$aa]";}
}
print "\n";
}

#comp sub here
sub comp {
my ($char_ref)=@_;
my @char=@$char_ref;
my $cnt="";
for (my $aa=0; $aa<=$#char; $aa++) {
    if ($char[$aa+1]) {
        if ($char[$aa] eq $char[$aa+1]) { $cnt++; }  
        elsif ($cnt) { print "$char[$aa]"."$cnt"; undef $cnt;}
        else {print "$char[$aa]";}
    }
}
print "\n";
}
__DATA__
raaaammmmmaaaaaj
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