1 files changed, 26 insertions, 13 deletions
diff --git a/weed/operation/compress.go b/weed/operation/compress.go
index fedc877dd..7190eeeb2 100644
--- a/weed/operation/compress.go
+++ b/weed/operation/compress.go
@@ -16,50 +16,63 @@ import (
  */
 func IsGzippable(ext, mtype string, data []byte) bool {
 
+	shouldBeZipped, iAmSure := IsGzippableFileType(ext, mtype)
+	if iAmSure {
+		return shouldBeZipped
+	}
+
+	isMostlyText := util.IsText(data)
+
+	return isMostlyText
+}
+
+/*
+* Default more not to gzip since gzip can be done on client side.
+ */
+func IsGzippableFileType(ext, mtype string) (shouldBeZipped, iAmSure bool) {
+
 	// text
 	if strings.HasPrefix(mtype, "text/") {
-		return true
+		return true, true
 	}
 
 	// images
 	switch ext {
 	case ".svg", ".bmp":
-		return true
+		return true, true
 	}
 	if strings.HasPrefix(mtype, "image/") {
-		return false
+		return false, true
 	}
 
 	// by file name extension
 	switch ext {
 	case ".zip", ".rar", ".gz", ".bz2", ".xz":
-		return false
+		return false, true
 	case ".pdf", ".txt", ".html", ".htm", ".css", ".js", ".json":
-		return true
+		return true, true
 	case ".php", ".java", ".go", ".rb", ".c", ".cpp", ".h", ".hpp":
-		return true
+		return true, true
 	case ".png", ".jpg", ".jpeg":
-		return false
+		return false, true
 	}
 
 	// by mime type
 	if strings.HasPrefix(mtype, "application/") {
 		if strings.HasSuffix(mtype, "xml") {
-			return true
+			return true, true
 		}
 		if strings.HasSuffix(mtype, "script") {
-			return true
+			return true, true
 		}
 	}
 
-	isMostlyText := util.IsText(data)
-
-	return isMostlyText
+	return false, false
 }
 
 func GzipData(input []byte) ([]byte, error) {
 	buf := new(bytes.Buffer)
-	w, _ := gzip.NewWriterLevel(buf, flate.BestCompression)
+	w, _ := gzip.NewWriterLevel(buf, flate.BestSpeed)
 	if _, err := w.Write(input); err != nil {
 		glog.V(2).Infoln("error compressing data:", err)
 		return nil, err