        <span class="bp">self</span><span class="o">.</span><span class="n">_search</span><span class="p">(</span><span class="n">collection</span><span class="p">)</span>

        <span class="bp">self</span><span class="o">.</span><span class="n">memoryRSS</span> <span class="o">=</span> <span class="n">ps</span><span class="o">.</span><span class="n">memory_info</span><span class="p">()</span><span class="o">.</span><span class="n">rss</span>
        <span class="bp">self</span><span class="o">.</span><s