PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: global vs. local

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Result: Discarded

The test labeled "global" was the faster by 0.01 seconds, (0.978% faster)

global 100%
local 99.022%

The global test took 1.0159 seconds.
The local test took 1.026 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 250,331 loops for a total of 5,006,620 runs.

  • Line execution difference (0.000002) milliseconds.
  • Avg difference (0.502) milliseconds per 250,331 loops.
  • Total difference 10.04 milliseconds for 5,006,620 loops

The iteration variablity for Code 1 was (4.3906) milliseconds and Code 2 was (3.2329) 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 (7.2.22-1+ubuntu16.04.1+deb.sury.org+1)