Hi!
Can you provide some benchmark setups that this could be researched -
i.e. describe what was benchmarked and how to reproduce it?
I have already played with this topic. If you don't have an opcode cache
lazy loading is a good solution: it is worth loading a code only when
it is needed. But if you have opcode cache it is worth to put often used
includes into one big file.
I used the following test code:
<?php
$measurements = array();
$_GET += array("includeFileCardinality" => 9);
$_GET["includeFileCardinality"] =
min(max((int)$_GET["includeFileCardinality"], 1), 9);
$start = microtime(TRUE);
if ($_GET["includeFileCardinality"] >=1)
include_once("include.test/flash_config.php");
if ($_GET["includeFileCardinality"] >=2)
include_once("include.test/access.php");
if ($_GET["includeFileCardinality"] >=3)
include_once("include.test/awe_config.php");
if ($_GET["includeFileCardinality"] >=4)
include_once("include.test/functions.php");
if ($_GET["includeFileCardinality"] >=5)
include_once("include.test/domain_constants.php");
if ($_GET["includeFileCardinality"] >=6)
include_once("include.test/categories.php");
if ($_GET["includeFileCardinality"] >=7)
include_once("include.test/config.php");
if ($_GET["includeFileCardinality"] >=8)
include_once("include.test/common.php");
if ($_GET["includeFileCardinality"] >=9)
include_once("include.test/errorhandler.lib.php");
$measurements["include - tobb kulon fajl"] = microtime(TRUE)-$start;
$start = microtime(TRUE);
include_once("include.test/_all_in_one.php");
$measurements["include - egy nagy fajl"] = microtime(TRUE)-$start;
if (php_sapi_name() == "cli")
{
echo serialize($measurements);
}
else
{
header("Content-Type: text/html; charset=UTF-8");
displayMeasurments("Eredmények apache modul esetén", $measurements);
displayMeasurments("Eredmények CLI módban",
unserialize(shell_exec("php ".__FILE__)));
echo "
<form>
Az egyesével include-olt fájlok száma:<br>
<select name=\"includeFileCardinality\" size=\"5\">
<option value=\"1\">1</option>
<option value=\"2\">2</option>
<option value=\"3\">3</option>
<option value=\"4\">4</option>
<option value=\"5\">5</option>
<option value=\"6\">6</option>
<option value=\"7\">7</option>
<option value=\"8\">8</option>
<option value=\"9\">9</option>
</select><br>
<input type=\"submit\" value=\"Teszt\">
</form>
";
}
function displayMeasurments($title, $measurements)
{
$fastestTime = min($measurements);
echo "<table border=\"1\">\n<tr><td colspan=\"3\"
align=\"center\"><strong>".$title."</strong></td></tr>\n";
foreach($measurements as $testMethod => $elapsedTime)
{
echo "<tr><td>".$testMethod."</td>\n";
echo "<td>".$elapsedTime."</td>\n";
echo
"<td>".round($elapsedTime/$fastestTime*100)."%</td></tr>\n\n";
}
echo "</table>\n<br>";
}
?>
The files come from a real life project. I get the following result:
Results (apache module)
include - more files 0.000619888305664 307%
include - one big file 0.000202178955078 100%
I run the test code a lot of time, I get this characteristics always.
Then I tried the code on heavily IO loaded server (x100 req/sec+DB
replica) and the difference was bigger (5-600%).
Best Regards,
Felhő
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