PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: strncmp vs. strpos (long)

2000 character string, check if a substring exists in a defined location, both pass and fail paths.

View test history (2) Run this test again Return to test menu

Result: Discarded

The test labeled "strpos()" was the faster by 0.0044 seconds, (0.829% faster)

strpos() 100%
strncmp() 99.171%

The strpos() test took 0.5291 seconds.
The strncmp() test took 0.5336 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 142,505 loops for a total of 2,850,100 runs.

  • Line execution difference (0.000002) milliseconds.
  • Avg difference (0.221) milliseconds per 142,505 loops.
  • Total difference 4.42 milliseconds for 2,850,100 loops

The iteration variablity for Code 1 was (1.4759) milliseconds and Code 2 was (1.0132) milliseconds. The lower and the closer together there values are the more accurate the results are.

Code

The first test, "strncmp()", was:

for ($j = 0; $j < 40; $j++)
	$GLOBALS['dummy'] = strncmp($GLOBALS['dummy_match'], '01234', 5) === 0;
for ($j = 0; $j < 40; $j++)
	$GLOBALS['dummy'] = strncmp($GLOBALS['dummy_fail'], '01234', 5) === 0;

The second test, "strpos()", was:

for ($j = 0; $j < 40; $j++)
	$GLOBALS['dummy'] = strpos($GLOBALS['dummy_match'], '01234') === 0;
for ($j = 0; $j < 40; $j++)
	$GLOBALS['dummy'] = strpos($GLOBALS['dummy_fail'], '01234') === 0;

Running: Linux (x86_64:1 GB) PHP (7.2.22-1+ubuntu16.04.1+deb.sury.org+1)