Hi, After the upgrade of the `commons-text` library from 1.8 to 1.10 we faced a higher number of garbage collections and higher times of garbage collection. For now we rolled back to 1.8 but as I had some vulnerabilities we do want to upgrade.
We are actively using the `TextStringBuilder` class, so I've briefly looked at the changes there. One change looks suspicious - hashCode method change in following PR https://github.com/apache/commons-text/pull/281. As I understand this correctly for now you are creating a new String instance every time when Java calls `hashCode` method. I implemented a simple loop that calls hashCode 100M times, turned on verbose GC (-verbose:gc -XX:+PrintGCDetails) and I can confirm that with the new implementation GC runs 55 times instead of 2. As I cannot sign up for your jira, could you please help me create the ticket and if possible probably you could rollback the implementation to that was in 1.8 version? Thank you in advance! -- Pavel Belousov Senior Software Engineer [image: Booking.com] <https://www.booking.com/> Making it easier for everyone to experience the world.
