diff --git a/t3lib/class.t3lib_compressor.php b/t3lib/class.t3lib_compressor.php
index ec560c9..6565c10 100644
--- a/t3lib/class.t3lib_compressor.php
+++ b/t3lib/class.t3lib_compressor.php
@@ -177,6 +177,28 @@ class t3lib_Compressor {
 	 * @return array CSS files
 	 */
 	public function concatenateCssFiles(array $cssFiles, array $options = array()) {
+		$cache = $GLOBALS['typo3CacheManager']->getCache('cache_hash');
+		$identifier = sha1(serialize($cssFiles) . serialize($options));
+
+		$result = $cache->get($identifier);
+		if ($result === FALSE) {
+			$result = self::concatenateCssFilesWorker($cssFiles, $options);
+			$cache->set($identifier, $result);
+		}
+		return $result;
+	}
+
+	/**
+	 * Concatenates the Stylesheet files
+	 *
+	 * Options:
+	 *   baseDirectories If set, only include files below one of the base directories
+	 *
+	 * @param array $cssFiles CSS files to process
+	 * @param array $options Additional options
+	 * @return array CSS files
+	 */
+	protected function concatenateCssFilesWorker(array $cssFiles, array $options = array()) {
 		$filesToInclude = array();
 		foreach ($cssFiles as $key => $fileOptions) {
 				// no concatenation allowed for this file, so continue
@@ -218,6 +240,24 @@ class t3lib_Compressor {
 	 * @return array JS files
 	 */
 	public function concatenateJsFiles(array $jsFiles) {
+		$cache = $GLOBALS['typo3CacheManager']->getCache('cache_hash');
+		$identifier = sha1(serialize($jsFiles));
+
+		$result = $cache->get($identifier);
+		if ($result === FALSE) {
+			$result = self::concatenateJsFilesWorker($jsFiles);
+			$cache->set($identifier, $result);
+		}
+		return $result;
+	}
+
+	/**
+	 * Concatenates the JavaScript files
+	 *
+	 * @param array $jsFiles JavaScript files to process
+	 * @return array JS files
+	 */
+	protected function concatenateJsFilesWorker(array $jsFiles) {
 		$filesToInclude = array();
 		foreach ($jsFiles as $key => $fileOptions) {
 				// invalid section found or no concatenation allowed, so continue