diff --git a/js.module b/js.module
index c3ee318..8f463bd 100644
--- a/js.module
+++ b/js.module
@@ -625,7 +625,8 @@ function js_execute_request() {
 function _js_cache_initialize() {
   global $conf;
 
-  // We do not rely on autoloading as it may trigger a DB bootstrap.
+  // Skip autoloading, we do not need its overhead. Additionally it may trigger
+  // cache initialization.
   module_load_include('php', 'js', 'src/JsProxyCache');
 
   // Collect all the explicitly configured cache bins.
diff --git a/src/JsProxyCache.php b/src/JsProxyCache.php
index 7ed14c2..a8ccbeb 100644
--- a/src/JsProxyCache.php
+++ b/src/JsProxyCache.php
@@ -66,7 +66,8 @@ class JsProxyCache implements DrupalCacheInterface {
       $this->backend = new $class($bin);
     }
     else {
-      throw new LogicException('The JS cache handler was not properly configured');
+      $message = 'The cache backend configuration for the JS proxy cache handler is invalid: @conf';
+      throw new LogicException(format_string($message, array('@conf' => print_r(static::$conf, TRUE))));
     }
   }