execute_or_wait

# File activerecord/lib/active_record/future_result.rb, line 144
      def execute_or_wait
        if pending?
          start = Process.clock_gettime(Process::CLOCK_MONOTONIC, :float_millisecond)
          @mutex.synchronize do
            if pending?
              @pool.with_connection do |connection|
                execute_query(connection)
              end
            else
              @lock_wait = (Process.clock_gettime(Process::CLOCK_MONOTONIC, :float_millisecond) - start)
            end
          end
        else
          @lock_wait = 0.0
        end
      end