PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: global vs. $GLOBALS

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Result: Discarded

The test labeled "$GLOBALS" was the faster by 0.0194 seconds, (3.728% faster)

$GLOBALS 100%
global 96.272%

The $GLOBALS test took 0.502 seconds.
The global test took 0.5214 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 129,503 loops for a total of 2,590,060 runs.

  • Line execution difference (0.000008) milliseconds.
  • Avg difference (0.972) milliseconds per 129,503 loops.
  • Total difference 19.44 milliseconds for 2,590,060 loops

The iteration variablity for Code 1 was (1.9941) milliseconds and Code 2 was (0.8839) 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 (7.2.22-1+ubuntu16.04.1+deb.sury.org+1)