PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: substr($var, 5, 1) vs. {5}

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Historical Results

Based on (2) saved test runs, The test labeled "substr()" was (on average) the faster by 0.0055 seconds, (0.866% faster)

substr() 100%
{5} 99.134%

The substr() test took 0.6246 seconds.
The {5} test took 0.63 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 175,379 loops for a total of 3,507,570 runs.

  • Line execution difference (0.000002) milliseconds.
  • Avg difference (0.000) milliseconds per 175,379 loops.
  • Total difference 5.46 milliseconds for 3,507,570 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, "substr()", was:

for ($j = 0; $j < 100; $j++)
	$GLOBALS['dummy2'] = substr($GLOBALS['dummy'], 5, 1);

The second test, "{5}", was:

for ($j = 0; $j < 100; $j++)
	$GLOBALS['dummy2'] = $GLOBALS['dummy']{5};

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