Memory leak caused by Redis

[anhoder]

Q	A
Bug report?	yes
Feature request?	no
Swoft version	2.0.10
Swoole version	4.5.10
PHP version	7.3.23
Runtime environment	Docker

Describe the bug As I use Redis in the coroutine, the return value of memory_get_usage() gets larger and larger.

Expected behavior Memory usage will not continue to rise.

Screenshots

int(26856488)
int(26865864)
int(26875240)
int(26884616)
int(26893992)
int(26894392)
int(26895432)
int(26895832)
int(26896232)
int(26896632)
int(26897032)
int(26897432)
int(26897832)
int(26898232)
int(26899272)
int(26899672)
int(26900072)
int(26900472)
int(26900872)
int(26901272)
int(26901672)
int(26902072)
int(26902472)
int(26902872)
int(26903272)
int(26903672)
int(26904072)
int(26904472)
int(26904872)
int(26905272)
int(26906952)
int(26907352)
int(26907752)
int(26908152)
int(26908552)
int(26908952)
int(26909352)
int(26909752)
int(26910152)
int(26910552)
int(26910952)
int(26911352)
int(26911752)
int(26912152)
int(26912552)
int(26912952)
int(26913352)
int(26913752)

.......

int(27327656)
int(27328056)

Provide minimal script to reproduce the issue

    /**
     * @CommandMapping(desc="测试")
     */
    public function test()
    {
        $i = 1000;

        while (--$i) {
            sgo(function () {
                Redis::expire('test', 100);
            });

            Context::getWaitGroup()->wait();

            var_dump(memory_get_usage());
        }
     }