PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: global vs. local

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Historical Results

Based on (1) saved test runs, The test labeled "global" was (on average) the faster by 0.0102 seconds, (1.546% faster)

global 100%
local 98.454%

The global test took 0.6506 seconds.
The local test took 0.6608 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 170,552 loops for a total of 3,411,040 runs.

  • Line execution difference (0.000003) milliseconds.
  • Avg difference (0.000) milliseconds per 170,552 loops.
  • Total difference 10.21 milliseconds for 3,411,040 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:

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 (7.2.19-1+ubuntu16.04.1+deb.sury.org+1)