Leak branch here

@michael-grunder have we already merged changes from your branch?

No. The leaks are actually non-trivial to fix. I did get most of them in this branch though.

The good news is that they're pretty obscure/rare and don't likely occur very often.

I can revisit this to see about fixing the last ones I didn't get to yet.

Hello, first of all thanks for the work on this library, it has really helped us scale our php microservices.

I wanted to report that we are having some issues with memory leaks after integrating in a high traffic production server.

We performed some simple debugging using memory_get_usage() and the delta was several megabytes more than the actual payload that was being processed in the request. We have narrowed down the leak to the usage on a rate limiting function that uses a query like this:

# This is the php-redis client, we are using version 5.3.2
$this->client->cache
                ->multi(Redis::PIPELINE)
                ->hset(self::$BASE_RATE_LIMIT_COUNTER_KEY, $tokens_bucket_key, $this->token_allowance)
                ->hset(self::$BASE_RATE_LIMIT_COUNTER_KEY, $last_reset_key, $now->getTimestamp())
                ->exec();

We are currently using version:

=========================================
Package Version State
redis   5.3.2   stable

It would be great if you could perhaps share if there is a known leak in any of those commands or the use of pipelining.

Thanks!