PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: time vs. microtime(true)

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Historical Results

Based on (1) saved test runs, The test labeled "time()" was (on average) the faster by 0.009 seconds, (0.828% faster)

time() 100%
microtime(true) 99.172%

The time() test took 1.0767 seconds.
The microtime(true) test took 1.0857 seconds.


Each test case ran 20 random code order iterations consisting of 290,917 loops for a total of 5,818,340 runs.

  • Line execution difference (0.000002) milliseconds.
  • Avg difference (0.000) milliseconds per 290,917 loops.
  • Total difference 8.99 milliseconds for 5,818,340 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, "time()", was:

for ($i = 0; $i < 100; $i++)
	$GLOBALS['dummy'] = time();

The second test, "microtime(true)", was:

for ($i = 0; $i < 100; $i++)
	$GLOBALS['dummy'] = microtime(true);

Running: Linux (x86_64:1 GB) PHP (