From: Jim Meyering Date: Sun, 13 Sep 2009 09:48:03 +0000 (+0200) Subject: doc: improve NEWS X-Git-Tag: v8.0~56 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=21b617b78b5f53c1b6e1447f1709b1c2aa9f466f;p=thirdparty%2Fcoreutils.git doc: improve NEWS * NEWS (rm -r, without -f): Mention that the N in "O(N)" represents hierarchy depth. Suggested by Ralf Wildenhues. (rm -r, standards conformance): Make wording more accurate. --- diff --git a/NEWS b/NEWS index b3c6c8c4aa..ec41ca7732 100644 --- a/NEWS +++ b/NEWS @@ -14,14 +14,14 @@ GNU coreutils NEWS -*- outline -*- 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). 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: + 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 is now slightly more standards-conformant when operating on - write-protected relative file names longer than 8KiB. + write-protected files with relative names longer than 8KiB. * Noteworthy changes in release 7.6 (2009-09-11) [stable]