diff options
Diffstat (limited to 'NEWS')
| -rw-r--r-- | NEWS | 13 |
1 files changed, 7 insertions, 6 deletions
@@ -13,12 +13,13 @@ GNU coreutils NEWS -*- outline -*- This makes rm -rf significantly faster (400-500%) in some pathological cases, and slightly slower (20%) in at least one pathological case. - rm -r deletes deep hierarchies more efficiently. Before, it took O(N^2) - time, now it takes O(N), where N is the depth of the hierarchy. However, - this improvement is not as pronounced as might be expected for very - deep trees, because prior to this change, for any relative name length - longer than 8KiB, rm -r would sacrifice official conformance to avoid the - disproportionate O(N^2) performance penalty. Leading to another improvement: + rm -r deletes deep hierarchies more efficiently. Before, execution time + was quadratic in the depth of the hierarchy, now it is merely linear. + However, this improvement is not as pronounced as might be expected for + very deep trees, because prior to this change, for any relative name + length longer than 8KiB, rm -r would sacrifice official conformance to + avoid the disproportionate quadratic performance penalty. Leading to + another improvement: rm -r is now slightly more standards-conformant when operating on write-protected files with relative names longer than 8KiB. |