I need help profiling this code, it needs to be quicker.
I need to capture the word that follows the first occurence of the string "hostname" in several thousand files. At first I tried a system call to grep, since grep is a C binary I thought it would be quickest, but apparently the system call overhead makes it slower. This is what I have: 
@cache = `cat filelist`;

foreach $path (@cache) {
        open F, $path;
        while (<F>) {
                if (/hostname ([\-\w]+)/) {
                        $hostname = $1;
                        last;
                }
        }
        print "$hostname\n";
}

[download]
Here is the Devel::SmallProf output 
            ================ SmallProf version 0.9 ================
                                Profile of prof                       
+ Page 1
       ===============================================================
+==
    count wall tm  cpu time line
        0 0.000000 0.000000     1:#!/opt/CSCOpx/bin/perl
        0 0.000000 0.000000     2:
        1 0.000004 0.000000     3:$RUNDIR = "/var/adm/links/newrun";
        0 0.000000 0.000000     4:
        0 0.000000 0.000000     5:
        1 0.013885 0.010000     6:@cache = `cat $RUNDIR/filelist`;
        0 0.000000 0.000000     7:
    11600 0.059747 0.050000     8:foreach $path (@cache) {
    11599 0.906185 0.080000     9: open F, $path;
   284014 3.008497 1.210000    10: while (<F>) {
   283652 3.195402 0.840000    11:  if (/hostname ([-\w]+)/) {
    11599 0.101677 0.060000    12:   $hostname = $1;
    11599 0.094969 0.040000    13:   last;
        0 0.000000 0.000000    14:  }
        0 0.000000 0.000000    15: }
    11599 0.127013 0.050000    16: print $hostname." ";
        0 0.000000 0.000000    17:}

[download]

In reply to profiling help by permanentE

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