diff --git a/tumblr_machine.rb b/tumblr_machine.rb
index 96e6810..9d854ed 100644
--- a/tumblr_machine.rb
+++ b/tumblr_machine.rb
@@ -96,14 +96,27 @@ def json(code, message)
 
   get '/' do
     check_logged
+
+    skippable_tumblr_ids =
+        Tumblr.
+            select(:id).
+            where('tumblrs.last_reblogged_post is not null and tumblrs.last_reblogged_post > ?', (DateTime.now << 1))
+
     @total_posts = Post.count
+
     @number_waiting_posts = Post.
         where('skip is not ?', true).
         where('posted = ?', false).
         where('tumblr_id not in (?)', skippable_tumblr_ids).
         where('score >= ?', MIN_SCORE).
         count
-    @posts = next_posts().limit(500).to_a
+
+    @posts = Post.
+        where('skip is not ?', true).
+        where(:posted => false).
+        where('tumblr_id not in (?)', skippable_tumblr_ids).
+        order(Sequel.desc(:score), Sequel.desc(:fetched)).
+        limit(500).to_a
 
     tags_with_score = tags_with_score_in_hash
 
@@ -328,14 +341,12 @@ def fetch_tags(tags_names)
 
     tags_with_score = tags_with_score_in_hash
 
-    fingerprints = {}
-    semaphore = Mutex.new
     found_posts.each do |found_post|
       begin
         if (post = create_post(found_post, tags_with_score))
           posts_count += 1
           if post.img_url && (post.score >= MIN_SCORE) && (!post.img_saved)
-            hydra.queue(create_storage_request(post, fingerprints, semaphore))
+            hydra.queue(create_storage_request(post))
           end
         end
       rescue Exception => e
@@ -344,22 +355,6 @@ def fetch_tags(tags_names)
     end
     hydra.run
 
-    fingerprints.each_pair do |post_id, fingerprint|
-      post = Post.where(:id => post_id).first
-      if fingerprint
-        post.update({:img_saved => true, :fingerprint => fingerprint})
-        unless Post.
-            where('fingerprint is not null').
-            where('id != ?', post_id).
-            where('hamming(fingerprint, (select fingerprint from posts where id = ?)) >= ?', post_id, DUPLICATE_LEVEL).
-            empty?
-          post.update({:skip => true})
-        end
-      else
-        post.update({:img_saved => true})
-      end
-    end
-
     Tag.where(:name => tags_names).update(:last_fetch => DateTime.now)
     posts_count
   end
@@ -367,10 +362,8 @@ def fetch_tags(tags_names)
 
   # Create the request to store an image
   # @params post [Post] the post we do the stuff for
-  # @param fingerprints [Hash<Integer, String>] hash to add fingerprint
-  # @param semaphore [Mutex] a mutex to synchronize
   # @return []Typhoeus::Request} the Request to add
-  def create_storage_request(post, fingerprints, semaphore)
+  def create_storage_request(post)
     request = Typhoeus::Request.new post.img_url
     request.on_complete do |response|
       if response.code == 200
@@ -380,12 +373,22 @@ def create_storage_request(post, fingerprints, semaphore)
           file.write response.body
         end
 
-        semaphore.synchronize do
-          if File.exist? dest_file
-            post_fingerprint = Phashion::Image.new(dest_file).fingerprint
-            fingerprints[post.id] = Sequel.lit("B'#{post_fingerprint.to_s(2).rjust(64, '0')}'")
-          else
-            fingerprints[post.id] = nil
+        if File.exist? dest_file
+          post_fingerprint = Phashion::Image.new(dest_file).fingerprint
+          sql_fingerprint = Sequel.lit("B'#{post_fingerprint.to_s(2).rjust(64, '0')}'")
+
+          DATABASE.transaction do
+            DATABASE[
+                'UPDATE posts SET img_saved = TRUE, fingerprint = ?, skip = exists(select * from posts p2 where p2.fingerprint is not null and p2.id != ? and hamming(p2.fingerprint, ?) >= ?) WHERE id = ?',
+                sql_fingerprint,
+                post.id,
+                sql_fingerprint,
+                DUPLICATE_LEVEL,
+                post.id].update
+          end
+        else
+          DATABASE.transaction do
+            post.update({:img_saved => true})
           end
         end
       end
@@ -405,7 +408,7 @@ def create_post(values, tags_with_score)
     tumblr_name = values[:tumblr_name]
     tumblr_url = values[:tumblr_url]
     DATABASE.transaction do
-      DATABASE['INSERT INTO tumblrs (name, url) SELECT ?, ? WHERE NOT EXISTS (SELECT id FROM tumblrs WHERE url = ?)', tumblr_name, tumblr_url, tumblr_url].all
+      DATABASE['INSERT INTO tumblrs (name, url) SELECT ?, ? WHERE NOT EXISTS (SELECT id FROM tumblrs WHERE url = ?)', tumblr_name, tumblr_url, tumblr_url].insert
     end
     tumblr = Tumblr.first(:url => values[:tumblr_url])
     if tumblr.name != tumblr_name
@@ -433,7 +436,7 @@ def create_post(values, tags_with_score)
     post_insert_query = "INSERT INTO posts (#{posts_insert_params.collect { |param| param[0] }.join(', ')}) SELECT #{Array.new(posts_insert_params.length, '?').join(', ')} WHERE NOT EXISTS (SELECT id FROM posts WHERE tumblr_post_id = ?)"
 
     DATABASE.transaction do
-      DATABASE[post_insert_query, *posts_insert_params.collect { |param| param[1] }, values[:id]].all
+      DATABASE[post_insert_query, *posts_insert_params.collect { |param| param[1] }, values[:id]].insert
     end
     Post.first(:tumblr_post_id => values[:id])
   end
@@ -451,22 +454,6 @@ def reblog(post)
         update(:last_reblogged_post => DateTime.now)
   end
 
-  # Finder for the next posts
-  def next_posts
-    Post.
-        where('skip is not ?', true).
-        where(:posted => false).
-        where('tumblr_id not in (?)', skippable_tumblr_ids).
-        order(Sequel.desc(:score), Sequel.desc(:fetched))
-  end
-
-  def skippable_tumblr_ids
-    @skippable_tumblr_ids ||=
-        Tumblr.
-            select(:id).
-            where('tumblrs.last_reblogged_post is not null and tumblrs.last_reblogged_post > ?', (DateTime.now << 1))
-  end
-
   def tags_with_score_in_hash
     Tag.where('value != ?', 0).to_hash(:name, :value)
   end