PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: global vs. $GLOBALS

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Historical Results

Based on (4) saved test runs, The test labeled "global" was (on average) the faster by 0.0029 seconds, (0.469% faster)

global 100%
$GLOBALS 99.531%

The global test took 0.6255 seconds.
The $GLOBALS test took 0.6285 seconds.


Each test case ran 20 random code order iterations consisting of 161,845 loops for a total of 3,236,905 runs.

  • Line execution difference (0.000001) milliseconds.
  • Avg difference (0.000) milliseconds per 161,845 loops.
  • Total difference 2.95 milliseconds for 3,236,905 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:

for ($i = 0; $i < 100; $i++)
	global $dummy, $dummy2;

	$dummy2 = $dummy;

The second test, "$GLOBALS", was:

for ($i = 0; $i < 100; $i++)
	$GLOBALS['dummy2'] = $GLOBALS['dummy'];

Running: Linux (x86_64:1 GB) PHP (