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

No Description

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

Result: Discarded

The test labeled "{5}" was the faster by 0.0255 seconds, (4.465% faster)

{5} 100%

substr() 95.535%

The {5} test took 0.5459 seconds.
The substr() test took 0.5714 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 139,670 loops for a total of 2,793,400 runs.

Line execution difference (0.000009) milliseconds.
Avg difference (1.276) milliseconds per 139,670 loops.
Total difference 25.51 milliseconds for 2,793,400 loops

The iteration variablity for Code 1 was (2.4957) milliseconds and Code 2 was (1.3747) 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};

PHP Benchmarks