Test: integer vs. string keys

Note that integers are being accessed as integers, strings as strings. This is not testing auto-casting, just which is faster when used consistently.

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Result: Saved

The test labeled "string" was the faster by 0.0259 seconds, (5.510% faster)

string 100%

integer 94.49%

The string test took 0.4444 seconds.
The integer test took 0.4703 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 103,429 loops for a total of 2,068,580 runs.

Line execution difference (0.000013) milliseconds.
Avg difference (1.296) milliseconds per 103,429 loops.
Total difference 25.91 milliseconds for 2,068,580 loops

The iteration variablity for Code 1 was (2.3129) milliseconds and Code 2 was (2.1836) milliseconds. The lower and the closer together there values are the more accurate the results are.

Code

The first test, "integer", was:

$GLOBALS['dummy_i'][42] = 1;
$GLOBALS['dummy_i'][43] = 1;

$GLOBALS['dummy2'] = $GLOBALS['dummy_i'][42];
$GLOBALS['dummy2'] = $GLOBALS['dummy_i'][43];

unset($GLOBALS['dummy_i'][42]);
unset($GLOBALS['dummy_i'][43]);

The second test, "string", was:

$GLOBALS['dummy_s']['s42'] = 1;
$GLOBALS['dummy_s']['s43'] = 1;

$GLOBALS['dummy2'] = $GLOBALS['dummy_s']['s42'];
$GLOBALS['dummy2'] = $GLOBALS['dummy_s']['s43'];

unset($GLOBALS['dummy_s']['s42']);
unset($GLOBALS['dummy_s']['s43']);

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