定时器调用getAllClientCount和getAllClientSessions，导致内存溢出

问题描述

在onWorkerStart($worker)中启动一个10S定时器，该定时器每次调用getAllClientCount和getAllClientSessions查询连接状态；结果每次调用内存都在不断的增长，最后导致内存不够进程复位；执行打印结果参考：
Print_Session_Info -----start-----使用: 8.66Mb
Print_Session_Info -----middle1------使用: 8.69Mb
Print_Session_Info -----middle1_1----使用: 8.71Mb
Print_Session_Info -----middle2------使用: 8.74Mb
Print_Session_Info -----middle2_1----使用: 8.76Mb

这里粘代码或配置
系统:Alibaba Cloud (Aliyun ) 2.1903 LTS (Hunting Beagle) x86_64(Py3.7.9)
Workerman version:4.0.40          PHP version:7.4.30
    public static function onWorkerStart($worker)
    {

            Timer::add(10, function () {
            Events::Print_Session_Info(1);
        });
    }

    public static function Print_Session_Info($flag)
    {
        echo "\nPrint_Session_Info -----start-----使用: ".number_format(memory_get_usage()/1024/1024, '2' , $dec_point = '.' , $thousands_sep = '')."Mb\n";
        Util::logger(Util::LOG_INFO,Util::DEV_GATEWAY_LP,"\n");
        Util::logger(Util::LOG_INFO,Util::DEV_GATEWAY_LP,">>>>>>>getAllClientCount: ".print_r(Gateway::getAllClientCount(),true));
        echo "\nPrint_Session_Info -----middle1------使用: ".number_format(memory_get_usage()/1024/1024, '2' , $dec_point = '.' , $thousands_sep = '')."Mb\n";
        Gateway::getAllClientCount();
        echo "\nPrint_Session_Info -----middle1_1----使用: ".number_format(memory_get_usage()/1024/1024, '2' , $dec_point = '.' , $thousands_sep = '')."Mb\n";
        $sessino_info = Gateway::getAllClientSessions();
        echo "\nPrint_Session_Info -----middle2------使用: ".number_format(memory_get_usage()/1024/1024, '2' , $dec_point = '.' , $thousands_sep = '')."Mb\n";
        Gateway::getAllClientSessions();
        echo "\nPrint_Session_Info -----middle2_1----使用: ".number_format(memory_get_usage()/1024/1024, '2' , $dec_point = '.' , $thousands_sep = '')."Mb\n";
    }