PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: (string) vs. interpolate

Common from perl, many people use double quotes to force a string value.

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Historical Results

Based on (2) saved test runs, The test labeled "(string)" was (on average) the faster by 0.0185 seconds, (3.633% faster)

(string) 100%
"$string" 96.367%

The (string) test took 0.4911 seconds.
The "$string" test took 0.5097 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 127,302 loops for a total of 2,546,030 runs.

  • Line execution difference (0.000007) milliseconds.
  • Avg difference (0.000) milliseconds per 127,302 loops.
  • Total difference 18.52 milliseconds for 2,546,030 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, "(string)", was:

for ($j = 0; $j < 1000; $j++)
	$GLOBALS['dummy'] = (string) $j;

The second test, ""$string"", was:

for ($j = 0; $j < 1000; $j++)
	$GLOBALS['dummy'] = "$j";

Running: Linux (x86_64:1 GB) PHP (7.2.19-1+ubuntu16.04.1+deb.sury.org+1)