Try to help PHPMailer#1824

$ php benchmark_reduce_mime_encoding.phps ... Size Method1 Method2 Method3 Method4 1.8kb 0.0646 0.1114 0.0561 0.1054 5.7kb 0.0757 0.1610 0.0624 0.1452 50kb 0.0846 0.1856 0.0623 0.1469 100kb 0.0989 0.1862 0.0740 0.1496 200kb 0.0636 0.1117 0.0563 0.1058 500kb 0.2195 0.3179 0.0834 0.1745 Method1: Send mails with creating a new PHPMailer instance. Method2: Send mails with only one PHPMailer instance. Method3: Send mails with creating a new PHPMailer instance and ReduceMIMEEncodeCacheStore. Method4: Send mails with only one PHPMailer instance and ReduceMIMEEncodeCacheStore.
changyy · Sep 6, 2019 · 3a94c03 · 3a94c03
1 parent 2d1ab8e
commit 3a94c03
Showing 1 changed file with 36 additions and 7 deletions.
diff --git a/src/PHPMailer.php b/src/PHPMailer.php
@@ -420,6 +420,17 @@ class PHPMailer
      */
     protected $SingleToArray = [];
 
+    /**
+     * Whether to send the same message to each receiver
+     * with small changes in mail content.
+     * Use a lookup table to reduce attachment encoding.
+     *
+     * Storage for attachment encoding.
+     *
+     * @var array
+     */
+    public $MIMECache = false;
+
     /**
      * Whether to generate VERP addresses on send.
      * Only applicable when sending via SMTP.
@@ -3028,14 +3039,32 @@ protected function attachAll($disposition_type, $boundary)
     protected function encodeFile($path, $encoding = self::ENCODING_BASE64)
     {
         try {
-            if (!static::isPermittedPath($path) || !file_exists($path)) {
-                throw new Exception($this->lang('file_open') . $path, self::STOP_CONTINUE);
-            }
-            $file_buffer = file_get_contents($path);
-            if (false === $file_buffer) {
-                throw new Exception($this->lang('file_open') . $path, self::STOP_CONTINUE);
+            $file_buffer = '';
+            if ($this->MIMECache !== false) {
+                $cache_key = $path . "\t" . $encoding;
+                if (array_key_exists($cache_key, $this->MIMECache)) {
+                    $file_buffer = &$this->MIMECache[$cache_key];
+                } else {
+                    if (!static::isPermittedPath($path) || !file_exists($path)) {
+                        throw new Exception($this->lang('file_open') . $path, self::STOP_CONTINUE);
+                    }
+                    $file_buffer = file_get_contents($path);
+                    if (false === $file_buffer) {
+                        throw new Exception($this->lang('file_open') . $path, self::STOP_CONTINUE);
+                    }
+                    $file_buffer = $this->encodeString($file_buffer, $encoding);
+                    $this->MIMECache[$cache_key] = $file_buffer;
+                }
+            } else {
+                if (!static::isPermittedPath($path) || !file_exists($path)) {
+                    throw new Exception($this->lang('file_open') . $path, self::STOP_CONTINUE);
+                }
+                $file_buffer = file_get_contents($path);
+                if (false === $file_buffer) {
+                    throw new Exception($this->lang('file_open') . $path, self::STOP_CONTINUE);
+                }
+                $file_buffer = $this->encodeString($file_buffer, $encoding);
             }
-            $file_buffer = $this->encodeString($file_buffer, $encoding);
 
             return $file_buffer;
         } catch (Exception $exc) {