PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: substr on short vs. long strings

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Historical Results

Based on (1) saved test runs, The test labeled "long (x200)" was (on average) the faster by 0.0156 seconds, (2.726% faster)

long (x200) 100%
short 97.274%

The long (x200) test took 0.557 seconds.
The short test took 0.5726 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 135,093 loops for a total of 2,701,860 runs.

  • Line execution difference (0.000006) milliseconds.
  • Avg difference (0.000) milliseconds per 135,093 loops.
  • Total difference 15.61 milliseconds for 2,701,860 loops

The iteration variablity for Code 1 was (0.0000) milliseconds and Code 2 was (0.0000) milliseconds. The lower and the closer together there values are the more accurate the results are.

Code

The first test, "short", was:

for ($j = 0; $j < 100; $j++)
	$GLOBALS['dummy2'] = substr($GLOBALS['dummy_short'], 10, 10);

The second test, "long (x200)", was:

for ($j = 0; $j < 100; $j++)
	$GLOBALS['dummy2'] = substr($GLOBALS['dummy_long'], 10, 10);

Running: Linux (x86_64:1 GB) PHP (7.2.34-8+ubuntu16.04.1+deb.sury.org+1)