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 0.007 seconds, (0.579% faster)

local 100%
global 99.421%

The local test took 1.2046 seconds.
The global test took 1.2117 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 290,615 loops for a total of 5,812,300 runs.

  • Line execution difference (0.000001) milliseconds.
  • Avg difference (0.351) milliseconds per 290,615 loops.
  • Total difference 7.02 milliseconds for 5,812,300 loops

The iteration variablity for Code 1 was (8.0913) milliseconds and Code 2 was (5.4326) 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 (7.2.25-1+ubuntu16.04.1+deb.sury.org+1)