Share DNS and Connect between curl requests (#117)

* Share DNS and Connect between curl requests

reduces overhead when doing multiple curl requests per php-request.

other places which manually invoke `curl_init` can benefit in a similar way by adding such code.
`curl_multi_*` will automatically share caches between requests, without the need for additional code.

* fix

* cs

* fix type

---------

Co-authored-by: Markus Staab <[email protected]>

Author: staabm

src/JiraClient.php

@@ -35,6 +35,11 @@ class JiraClient
      */
     protected \CurlHandle $curl;
 
+    /**
+     * CURL share instance.
+     */
+    protected \CurlShareHandle|\CurlSharePersistentHandle|null $curlShare = null;
+
     /**
      * Monolog instance.
      */
@@ -158,6 +163,20 @@ public function curlPrepare(\CurlHandle|bool $ch, array $curl_http_headers, ?str
             curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $this->getConfiguration()->getTimeout());
         }
 
+        if ($this->curlShare === null) {
+            if (\function_exists('curl_share_init_persistent')) {
+                $this->curlShare = curl_share_init_persistent([
+                    CURL_LOCK_DATA_DNS,
+                    CURL_LOCK_DATA_CONNECT,
+                ]);
+            } else {
+                $this->curlShare = curl_share_init();
+                curl_share_setopt($share, CURLSHOPT_SHARE, CURL_LOCK_DATA_DNS);
+                curl_share_setopt($share, CURLSHOPT_SHARE, CURL_LOCK_DATA_CONNECT);
+            }
+        }
+        curl_setopt($ch, CURLOPT_SHARE, $this->curlShare);
+
         return $curl_http_headers;
     }