pan class='const'>Concurrent</span><span class='op'>::</span><span class='const'>ThreadPoolExecutor</span><span class='period'>.</span><span class='id identifier rubyid_new'>new</span><span class='lparen'>(</span><span class='label'>min_threads:</span> <span class='int'>4</span><span class='comma'>,</span> <span class='label'>max_threads:</span> <span class='int'>16</span><span class='comma'>,</span> <span class='label'>max_queue:</span> <span class='int'>10_000</span><span class='rparen'>)</span>
  <span c