The expiration of Oracle's patent US7680791B2 has made the Orasort sorting algorithm, which offers a claimed 5× performance improvement, available in the public domain for open-source databases like MySQL and PostgreSQL. Developed by Mark Callaghan, Orasort enhances sorting workloads with similar keys and incorporates optimizations such as skipping repeated comparisons, adaptively switching sorting methods, caching key substrings, prefetching data, and producing partial results. The algorithm has shown to be approximately five times faster than previous sorting methods used by Oracle. The open-source community is actively exploring its integration into various database engines, with early experimentation underway using programming languages like Python, C, and C++.