<p></p>
<p dir="auto">Regarding N+1 queries, I tried a gem called 'bullet', which needs a bit of config in config/environments/development.rb:</p>
<pre class="notranslate"><code class="notranslate">  config.after_initialize do
    #Enable bullet in your application
    Bullet.enable = true
    Bullet.rails_logger = true
  end  
</code></pre>
<p dir="auto">It would then complain about N*1 queries, or suggest to remove eager loading where not needed.</p>
<pre class="notranslate"><code class="notranslate">GET /changeset/127673
USE eager loading detected
  OldRelation => [:redaction]
  Add to your query: .includes([:redaction])
Call stack
</code></pre>
<p dir="auto">As an example, the suggested changes to "changeset_controller.rb - show" would be to add additional :includes for old_nodes/ways/relations:  <code class="notranslate">:include => [:old_tags, :redaction]</code></p>
<pre class="notranslate"><code class="notranslate">    @node_pages, @nodes = paginate(:old_nodes, :include => [:old_tags, :redaction], :conditions => { :changeset_id => @changeset.id }, :per_page => 20, :parameter => "node_page")
    @way_pages, @ways = paginate(:old_ways, :include => [:old_tags, :redaction], :conditions => { :changeset_id => @changeset.id }, :per_page => 20, :parameter => "way_page")
    @relation_pages, @relations = paginate(:old_relations, :include => [:old_tags, :redaction], :conditions => { :changeset_id => @changeset.id }, :per_page => 20, :parameter => "relation_page")
 
</code></pre>

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