Info Catalog
diffutils: Ignoring Changes
diffutils: Shortcomings
18.1.7 Improving Performance ---------------------------- When comparing two large directory structures, one of which was originally copied from the other with timestamps preserved (e.g., with 'cp -pR'), it would greatly improve performance if an option told 'diff' to assume that two files with the same size and timestamps have the same content. ⇒diff Performance.