PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: global vs. local

No Description

View test history (1) Run this test again Return to test menu

Result: Discarded

The test labeled "local" was the faster by 0.0216 seconds, (3.422% faster)

local 100%
global 96.578%

The local test took 0.6088 seconds.
The global test took 0.6304 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 160,363 loops for a total of 3,207,260 runs.

  • Line execution difference (0.000007) milliseconds.
  • Avg difference (1.079) milliseconds per 160,363 loops.
  • Total difference 21.57 milliseconds for 3,207,260 loops

The iteration variablity for Code 1 was (2.7306) milliseconds and Code 2 was (1.0251) 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)