PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: global vs. local

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Result: Discarded

The test labeled "local" was the faster by 0.0812 seconds, (6.675% faster)

local 100%
global 93.325%

The local test took 1.1356 seconds.
The global test took 1.2168 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 275,669 loops for a total of 5,513,380 runs.

  • Line execution difference (0.000015) milliseconds.
  • Avg difference (4.061) milliseconds per 275,669 loops.
  • Total difference 81.22 milliseconds for 5,513,380 loops

The iteration variablity for Code 1 was (11.7725) milliseconds and Code 2 was (7.7596) 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 (7.2.34-21+ubuntu16.04.1+deb.sury.org+1)