Demo of finfo performance in php 7.2 vs 7.3

finfotest.sh

#!/bin/bash
set -e

ITERS=${1:-1000}

echo "Testing finfo over $ITERS iterations"
for VER in '7.2' '7.3'; do
        echo ---
        echo "Testing PHP $VER"
        docker run -i \
                -e "ITERS=${ITERS}" \
                php:${VER}-cli-alpine php <<'EOF'
<?php
$iters = $_ENV["ITERS"];

$start = microtime(true);
for ($i = 1; $i <= $iters; $i++){
  $finfo = new finfo(FILEINFO_MIME);
  $type = $finfo->file("/bin/sh");
  unset($finfo);
}
$ttl = microtime(true) - $start;
echo "Took: $ttl\n";
?>
EOF
done