Warning: Division by zero in /var/customers/webs/stc/benchmark/index.php on line 256 Test: set duplicates vs. !isset

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Performance comparison of PHP code alternatives.

Test: set duplicates vs. !isset()

This checks the cost of writing vs. the cost of checking if you're already written - for values that commonly overlap.

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Result

Unfortunately, no history for this test is available.

Code

The first test, "set", was:

$array = array();
for ($n = 0; $n < 100; $n++)
{
	$k = floor($n / 12);
	$array[$k] = $n + 42;
}

The second test, "!isset()", was:

$array = array();
for ($n = 0; $n < 100; $n++)
{
	$k = floor($n / 12);
	if (!isset($array[$k]))
		$array[$k] = $n + 42;
}

Running: Linux (x86_64:1 GB) PHP (7.2.25-1+ubuntu16.04.1+deb.sury.org+1)