Veritas File System (VxFS) deduplication uses shared extents to save storage when duplicate data is identified. Shared extents can significantly boost read performance for certain types of applications. These benefits are the result of the innovative use of file system page cache for data that resides in shared extents.

The description of the FileSnaps feature contains more information about shared extents.

See About FileSnaps.

In general, any application or set of applications that read data residing in shared extents via multiple files are expected to have better read performance.