Benchmarking exif_read_data()

benchmark.php

<?php

$files = [
	'1.2MB' => 'photo-1.2MB.jpg',
	'2.5MB' => 'photo-2.5MB.jpg',
	'5.6MB' => 'photo-5.6MB.jpg',
	'7.9MB' => 'photo-7.9MB.jpg',
];

$handlers = [
	'data uri base64_encode()' => function($binary) {
		exif_read_data('data://image/jpeg;base64,' . base64_encode($binary));
	},
	'data uri urlencode()' => function($binary) {
		exif_read_data('data://application/octet-stream,' . urlencode($binary));
	},
	'data uri rawurlencode()' => function($binary) {
		exif_read_data('data://application/octet-stream,' . rawurlencode($binary));
	},
	'temp file' => function($binary) {
		$path = '/tmp/photo.jpg';
		file_put_contents($path, $binary);
		exif_read_data($path);
		unlink($path);
	},
];

$iterations = 10;
echo "\nBenchmarking against $iterations iteration(s):\n";
foreach ($files as $size => $filename) {
	$binary = file_get_contents($filename);
	echo "\n--- $size jpg file ---\n";
	foreach ($handlers as $name => $handler) {
		$start = microtime(true);
		for ($i = 0; $i < $iterations; $i++) {
			$handler($binary);
		}
		$seconds = microtime(true) - $start;
		echo number_format($seconds, 3) . "s - $name\n";		
	}
}

MacBook Pro Late 2013 with PCIe SSD Results.txt

Benchmarking against 10 iteration(s):

--- 1.2MB jpg file ---
0.298s - data uri base64_encode()
0.701s - data uri urlencode()
0.702s - data uri rawurlencode()
0.045s - temp file

--- 2.5MB jpg file ---
0.597s - data uri base64_encode()
1.422s - data uri urlencode()
1.424s - data uri rawurlencode()
0.060s - temp file

--- 5.6MB jpg file ---
1.329s - data uri base64_encode()
3.311s - data uri urlencode()
3.320s - data uri rawurlencode()
0.120s - temp file

--- 7.9MB jpg file ---
1.907s - data uri base64_encode()
4.541s - data uri urlencode()
4.531s - data uri rawurlencode()
0.178s - temp file

Server - Amazon with SSD.txt

Benchmarking against 10 iteration(s):

--- 1.2MB jpg file ---
0.625s - data uri base64_encode()
1.198s - data uri urlencode()
1.193s - data uri rawurlencode()
0.009s - temp file

--- 2.5MB jpg file ---
1.105s - data uri base64_encode()
2.454s - data uri urlencode()
2.428s - data uri rawurlencode()
0.017s - temp file

--- 5.6MB jpg file ---
2.660s - data uri base64_encode()
5.592s - data uri urlencode()
5.730s - data uri rawurlencode()
0.040s - temp file

--- 7.9MB jpg file ---
3.370s - data uri base64_encode()
8.020s - data uri urlencode()
8.072s - data uri rawurlencode()
0.061s - temp file