Try
use Regex::PreSuf;
my $bigregex = presuf( values %msgDefn );


my $start = time();
while( <FILEHANDLE> ){
    print if /$bigregex/;
}
my $end = time();
print "Time taken was ", ($end - $start), " seconds";

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In reply to Re: Parse a huge file and match the lines against a hash entry by Anonymous Monk
in thread Parse a huge file and match the lines against a hash entry by snra_perl

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