Everything PHP stores in Redis gets serialized first: sessions, cache entries, queued jobs. PHP's native serialize() produces a verbose text format, and most of us never think about it. igbinary is a PHP extension that swaps in a compact binary format instead, and you enable it with one config ...
Source: [Dev.to](https://dev.to/kevariable/igbinary-half-the-redis-memory-for-one-line-of-config-3o13)