PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: global vs. $GLOBALS

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Result: Discarded

The test labeled "global" was the faster by 0.0753 seconds, (4.981% faster)

global 100%
$GLOBALS 95.019%

The global test took 1.436 seconds.
The $GLOBALS test took 1.5113 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 276,532 loops for a total of 5,530,640 runs.

  • Line execution difference (0.000014) milliseconds.
  • Avg difference (3.764) milliseconds per 276,532 loops.
  • Total difference 75.27 milliseconds for 5,530,640 loops

The iteration variablity for Code 1 was (23.9514) milliseconds and Code 2 was (26.3122) milliseconds. The lower and the closer together there values are the more accurate the results are.

Code

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 (7.2.34-21+ubuntu16.04.1+deb.sury.org+1)