PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: Last Character

No Description

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Historical Results

Based on (1) saved test runs, The test labeled "$str[]" was (on average) the faster by 0.0074 seconds, (1.329% faster)

$str[] 100%
substr() 98.671%

The $str[] test took 0.5457 seconds.
The substr() test took 0.553 seconds.


Each test case ran 20 random code order iterations consisting of 131,844 loops for a total of 2,636,880 runs.

  • Line execution difference (0.000003) milliseconds.
  • Avg difference (0.000) milliseconds per 131,844 loops.
  • Total difference 7.35 milliseconds for 2,636,880 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 (