Binlog compression, it’s when you are using script which is compressing for you binlary logs based on your time policy.
It might be a simple cron task in bundle find + gzip or you can create a script for same :
Example:
## Binlog compression for files older than day
15,45 * * * * root find /path/to/binlog -maxdepth 1 -type f -mtime +1 -name “mysql-binlog.??????” -exec gzip {} \;

Thanks for sharing about built-in binlog transaction compression. This is something that needs to be checked first. I am curious if enabled binlog trx compression will be causing CPU overwhelming for replicas.

Regards,
Denis Subbota.
Managed Services, Percona.

Use binlog transaction compression instead, then these problems do not happen (https://dev.mysql.com/doc/refman/8.0/en/binary-log-transaction-compression.html). This has been released 3 years ago.