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List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.devel:315880 Archived-At: On Mon, 5 Feb 2024 at 07:49, Dmitry Gutov wrote: > The result would make it destructive and consequently faster (not > entirely non-consing, but close to it--while the current sort-on creates > two extra lists of length N), which should fit the original goal: a > faster sorting routine then uses ACCESSOR. Schwartzian transform transforms a sort algorithm that is O(n log n) accessor calls + O(n log n) comparison calls into one that is O(n) accessor calls + O(n log n) comparison calls. Depending on the accessor expensiveness, that may or may not balance out the consing and eventual GC.