#!/bin/bash

echo generate
perl -wE 'for (1..10000000) { print int(rand 2) ? "xyzabcd" : ("mul(" . int(rand 5000). "," . int(rand 5000) . ")" ) ; print "\n" unless int rand 10 }' > 1

echo python
cat <<EOF | (time python3 - 1)
import re
import sys

if len(sys.argv) < 2: exit(1)

mul_re = re.compile(r"mul\(\d{1,3},\d{1,3}\)")

with open (sys.argv[1], "r") as f:
    input = f.read()

count = len(mul_re.findall(input))

print(f"Found {count} matches.")
EOF

echo perl orig
cat <<'EOF' | (time perl - 1)
my $fn = shift;
exit 1 if not defined $fn;

my $input = do {
    open my $fh, "<", $fn or die "open failed";
    local $/;
    <$fh>
};
my $count = () = $input =~ m/mul\(\d{1,3},\d{1,3}\)/g;
print "Found $count matches.\n";
EOF

echo perl line by line
cat <<'EOF' | (time perl - 1)
my $fn = shift;
exit 1 if not defined $fn;

my $count = 0;
open my $fh, "<", $fn or die "open failed";
while (<$fh>) {
      ++$count while /mul\(\d{1,3},\d{1,3}\)/g;
}
print "Found $count matches.\n";
EOF

echo perl tybalt
cat <<'EOF' | (time perl - 1)
my $fn = shift;
exit 1 if not defined $fn;

my $input = do {
    open my $fh, "<", $fn or die "open failed";
    local $/;
    <$fh>
};
my $count = 0;
++$count while $input =~ /mul\(\d{1,3},\d{1,3}\)/g;
print "Found $count matches.\n";
EOF

rm 1