PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: Last Character

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Historical Results

Based on (2) saved test runs, The test labeled "substr()" was (on average) the faster by 0.0087 seconds, (1.159% faster)

substr() 100%
$str[] 98.841%

The substr() test took 0.7391 seconds.
The $str[] test took 0.7478 seconds.


Each test case ran 20 random code order iterations consisting of 206,868 loops for a total of 4,137,360 runs.

  • Line execution difference (0.000002) milliseconds.
  • Avg difference (0.000) milliseconds per 206,868 loops.
  • Total difference 8.67 milliseconds for 4,137,360 loops

The iteration variablity for Code 1 was (0.0000) milliseconds and Code 2 was (0.0000) milliseconds. The lower and the closer together there values are the more accurate the results are.


The first test, "substr()", was:

for ($j = 0; $j < 1000; $j++)
	$GLOBALS['dummy2'] = substr($GLOBALS['dummy'], -1);

The second test, "$str[]", was:

for ($j = 0; $j < 1000; $j++)
	$GLOBALS['dummy2'] = $GLOBALS['dummy'][strlen($GLOBALS['dummy'])-1];

Running: Linux (x86_64:1 GB) PHP (