PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: ob_start/ob_get_contents vs. concat

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Historical Results

Based on (5) saved test runs, The test labeled "ob_start()" was (on average) the faster by 0.0074 seconds, (0.870% faster)

ob_start() 100%
concat 99.13%

The ob_start() test took 0.8463 seconds.
The concat test took 0.8538 seconds.


Each test case ran 20 random code order iterations consisting of 183,962 loops for a total of 3,679,240 runs.

  • Line execution difference (0.000002) milliseconds.
  • Avg difference (0.000) milliseconds per 183,962 loops.
  • Total difference 7.43 milliseconds for 3,679,240 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, "ob_start()", was:


for ($i = 0; $i < 100; $i++)
	echo 'Wheat Thins!';

$GLOBALS['dummy'] = ob_get_contents();

The second test, "concat", was:

$value = '';
for ($i = 0; $i < 100; $i++)
	$value .= 'Wheat Thins!';

$GLOBALS['dummy'] = $value;

Running: Linux (x86_64:1 GB) PHP (