diff --git a/src/Plugin/facets/url_processor/QueryString.php b/src/Plugin/facets/url_processor/QueryString.php
index 3867f1e..059d19d 100644
--- a/src/Plugin/facets/url_processor/QueryString.php
+++ b/src/Plugin/facets/url_processor/QueryString.php
@@ -38,6 +38,10 @@ class QueryString extends UrlProcessorPluginBase {
    * {@inheritdoc}
    */
   public function buildUrls(FacetInterface $facet, array $results) {
+    static $requestsByPath = [];
+    static $requestUrlByPath = [];
+    static $routeParameters;
+
     // No results are found for this facet, so don't try to create urls.
     if (empty($results)) {
       return [];
@@ -57,18 +61,33 @@ class QueryString extends UrlProcessorPluginBase {
     $this->urlAlias = $facet->getUrlAlias();
 
     $request = $this->request;
-    if ($facet->getFacetSource()->getPath()) {
-      $request = Request::create($facet->getFacetSource()->getPath());
-      $request->attributes->set('_format', $this->request->get('_format'));
+    $facet_source_path = $facet->getFacetSource()->getPath();
+    if ($facet_source_path) {
+      if (isset($requestsByPath[$facet_source_path])) {
+        $request = $requestsByPath[$facet_source_path];
+      }
+      else {
+        $request = Request::create($facet_source_path);
+        $request->attributes->set('_format', $this->request->get('_format'));
+        $requestsByPath[$facet_source_path] = $request;
+      }
     }
 
-    // Grab any route params from the original request.
-    $routeParameters = Url::createFromRequest($this->request)
-      ->getRouteParameters();
+    if (!$routeParameters) {
+      // Grab any route params from the original request.
+      $routeParameters = Url::createFromRequest($this->request)
+        ->getRouteParameters();
+    }
 
-    // Create a request url.
-    $requestUrl = Url::createFromRequest($request);
-    $requestUrl->setOption('attributes', ['rel' => 'nofollow']);
+    if (array_key_exists($facet_source_path, $requestUrlByPath)) {
+      $requestUrl = $requestUrlByPath[$facet_source_path];
+    }
+    else {
+      // Create a request url.
+      $requestUrl = Url::createFromRequest($request);
+      $requestUrl->setOption('attributes', ['rel' => 'nofollow']);
+      $requestUrlByPath[$facet_source_path] = $requestUrl;
+    }
 
     /** @var \Drupal\facets\Result\ResultInterface[] $results */
     foreach ($results as &$result) {