2.23.0
- Remove the concept of "separate metadata." Features now always directly reference their keys and values rather than going through a second level of indirection.
- Limit the size of the string pool to 1/5 the size of memory, to prevent thrashing during feature ingestion.
- Avoid using writeable memory maps. Instead, explicitly copy data in and out of memory.
- Compress streams of features in the temporary files, to reduce disk usage and I/O latency