optimizate diff content

app/services/create_diff_record_service.rb

@@ -20,10 +20,26 @@ class CreateDiffRecordService < ApplicationService
 
   def diff_content
     content = ''
+
+    arr = []
+    index = 0
+    fragment_size = 1
     Diffy::Diff.new(before, after).each do |line|
-      next unless line =~ /^[\+-]/
+      unless line =~ /^[\+-]/
+        if arr.empty? && index < fragment_size
+          content += line
+          index += 1
+        else
+          index = 0
+          arr << line
+          arr.shift if arr.size > fragment_size
+        end
+        next
+      end
 
+      content += arr.join('') if arr.present?
       content += line
+      arr.clear
     end
     content
   end