While profiling the Google Ads API Ruby library, we noticed that there are memory leaks with the Ruby protobuf library. The findings (go/ruby-protobuf-leak) and the credentials to replicate the issue has been shared internally with Josh H. This can be replicated independently if you have access to Google Ads API (that's a reasonably high entry barrier, which is why I shared the creds for my test account with Josh H for easier replication). You need to follow the instructions at https://github.com/googleads/google-ads-ruby/blob/HEAD/README.md, then run test.zip attached with this bug.

test.zip