PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: global vs. $GLOBALS

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Historical Results

Based on (2) saved test runs, The test labeled "global" was (on average) the faster by 0.0094 seconds, (1.563% faster)

global 100%
$GLOBALS 98.437%

The global test took 0.5941 seconds.
The $GLOBALS test took 0.6036 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 159,026 loops for a total of 3,180,520 runs.

  • Line execution difference (0.000003) milliseconds.
  • Avg difference (0.000) milliseconds per 159,026 loops.
  • Total difference 9.44 milliseconds for 3,180,520 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.

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 (7.2.15-1+ubuntu16.04.1+deb.sury.org+1)