PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: date vs. strftime

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Historical Results

Based on (1) saved test runs, The test labeled "date()" was (on average) the faster by 0.0207 seconds, (2.822% faster)

date() 100%
strftime() 97.178%

The date() test took 0.7116 seconds.
The strftime() test took 0.7323 seconds.


Each test case ran 20 random code order iterations consisting of 149,210 loops for a total of 2,984,200 runs.

  • Line execution difference (0.000007) milliseconds.
  • Avg difference (0.000) milliseconds per 149,210 loops.
  • Total difference 20.67 milliseconds for 2,984,200 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.


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

for ($i = 0; $i < 100; $i++)
	$GLOBALS['dummy'] = date('Y-m-d \\a\\t H:i:s', $GLOBALS['t']);

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

for ($i = 0; $i < 100; $i++)
	$GLOBALS['dummy'] = strftime('%Y-%m-%d at %H:%M:%S', $GLOBALS['t']);

Running: Linux (x86_64:1 GB) PHP (