• Separated thread pools for indexing and lookup operations.
• Added full support for composite index seeks and scans.
• Vastly improved query optimizer.
• Added API to show query plan and order of operations, this is also available in the UI.
• Added finer granularity and additional categories to performance trace operations
• Performance counter refactoring.
• Removed element compression in favor of full page compression for better performance and space usage
• Greatly improved locking and concurrency. Much less contention and higher performance.

Full Changelog: https://github.com/NTDLS/NTDLS.Katzebase.Server/compare/0.14.0...0.15.0