PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: global vs. local

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Historical Results

Based on (3) saved test runs, The test labeled "global" was (on average) the faster by 0.0155 seconds, (2.027% faster)

global 100%
local 97.973%

The global test took 0.7506 seconds.
The local test took 0.7661 seconds.


Each test case ran 20 random code order iterations consisting of 180,480 loops for a total of 3,609,607 runs.

  • Line execution difference (0.000004) milliseconds.
  • Avg difference (0.000) milliseconds per 180,480 loops.
  • Total difference 15.53 milliseconds for 3,609,607 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, "global", was:

global $dummy;
for ($i = 0; $i < 100; $i++)
	$dummy = $i;

The second test, "local", was:

$dummy = null;
for ($i = 0; $i < 100; $i++)
	$dummy = $i;

Running: Linux (x86_64:1 GB) PHP (