Among available options, Aryson MDB Viewer is often considered one of the faster tools for handling large Microsoft Access databases. Aryson MDB Viewer is designed with optimized scanning algorithms and a lightweight architecture, allowing it to open MDB and ACCDB files without noticeable lag even when files are several gigabytes in size. Its “no file size limitation” feature and dual recovery modes help maintain performance while loading complex tables and indexes. Compared to basic MDB readers, it reduces load time by efficiently parsing database structures instead of fully importing them. However, actual speed can still depend on system RAM, processor, and disk speed. For very large databases, tools like Aryson MDB Viewer generally perform best when users need quick previewing, browsing, and analysis rather than full database editing or export-heavy operations. Overall it remains a strong choice for large MDB files workloads efficiently.