Test: sockets blocking vs. not

Normal sockets in PHP are blocking. Does using a select manually improve things for just a single socket? Note this test depends on external things, and so is fairly inaccurate.

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Historical Results

Based on (1) saved test runs, The test labeled "blocking" was (on average) the faster by 0.0016 seconds, (0.314% faster)

blocking 100%

non-blocking 99.686%

The blocking test took 0.4995 seconds.
The non-blocking test took 0.5011 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 131,917 loops for a total of 2,638,340 runs.

Line execution difference (0.000001) milliseconds.
Avg difference (0.000) milliseconds per 131,917 loops.
Total difference 1.57 milliseconds for 2,638,340 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.

Code

The first test, "blocking", was:

$fp = fsockopen('127.0.0.1', 80, $errno, $error);
fwrite($fp,
	'GET / HTTP/1.1' . "\r\n" .
	'Host: localhost' . "\r\n\r\n");

$GLOBALS['dummy2'] = fread($fp, 100);
fclose($fp);

The second test, "non-blocking", was:

$fp = fsockopen('127.0.0.1', 80, $errno, $error);
stream_set_blocking($fp, false);

$r = array($fp);
$w = array($fp);
$e = array();

if (stream_select($e, $w, $e, 2))
	fwrite($fp,
	'GET / HTTP/1.1' . "\r\n" .
	'Host: localhost' . "\r\n\r\n");

if (stream_select($r, $e, $e, 2))
	$GLOBALS['dummy2'] = fread($fp, 100);

fclose($fp);

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