交叉发布自我应该关闭 cURL 吗? https://stackoverflow.com/questions/18046637/to-close-curl-or-not/18046877因为我认为这在这里也相关。
我尝试对每个请求使用新的句柄来对curl进行基准测试,并使用相同的句柄和以下代码:
ob_start(); //Trying to avoid setting as many curl options as possible
$start_time = microtime(true);
for ($i = 0; $i < 100; ++$i) {
$rand = rand();
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, "http://www.google.com/?rand=" . $rand);
curl_exec($ch);
curl_close($ch);
}
$end_time = microtime(true);
ob_end_clean();
echo 'Curl without handle reuse: ' . ($end_time - $start_time) . '<br>';
ob_start(); //Trying to avoid setting as many curl options as possible
$start_time = microtime(true);
$ch = curl_init();
for ($i = 0; $i < 100; ++$i) {
$rand = rand();
curl_setopt($ch, CURLOPT_URL, "http://www.google.com/?rand=" . $rand);
curl_exec($ch);
}
curl_close($ch);
$end_time = microtime(true);
ob_end_clean();
echo 'Curl with handle reuse: ' . ($end_time - $start_time) . '<br>';
并得到以下结果:
不重复使用手柄的卷曲:8.5690529346466
卷曲手柄重复使用:5.3703031539917
因此,在多次连接到同一服务器时,重复使用相同的句柄实际上可以显着提高性能。我尝试连接到不同的服务器:
$url_arr = array(
'http://www.google.com/',
'http://www.bing.com/',
'http://www.yahoo.com/',
'http://www.slashdot.org/',
'http://www.stackoverflow.com/',
'http://github.com/',
'http://www.harvard.edu/',
'http://www.gamefaqs.com/',
'http://www.mangaupdates.com/',
'http://www.cnn.com/'
);
ob_start(); //Trying to avoid setting as many curl options as possible
$start_time = microtime(true);
foreach ($url_arr as $url) {
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_exec($ch);
curl_close($ch);
}
$end_time = microtime(true);
ob_end_clean();
echo 'Curl without handle reuse: ' . ($end_time - $start_time) . '<br>';
ob_start(); //Trying to avoid setting as many curl options as possible
$start_time = microtime(true);
$ch = curl_init();
foreach ($url_arr as $url) {
curl_setopt($ch, CURLOPT_URL, $url);
curl_exec($ch);
}
curl_close($ch);
$end_time = microtime(true);
ob_end_clean();
echo 'Curl with handle reuse: ' . ($end_time - $start_time) . '<br>';
并得到以下结果:
没有手柄重复使用的卷曲:3.7672290802002
卷曲手柄重复使用:3.0146431922913
性能提升还是相当可观的。