Markus - I've read your section on deltification and I can see evidence in what you wrote that you're concurrently in favor of and against it (the file-suffix exclusion idea). Can you re-read and clarify?
Thanks, - Paul On Tue, Jul 11, 2017 at 8:53 AM, Markus Schaber <m.scha...@codesys.com> wrote: > Hi, > > (Sorry, it seems my previous message was sent _very_ prematurely :-( > > From: Pavel Lyalyakin [mailto:pavel.lyalya...@visualsvn.com] > > Hello Paul, > > > > On Sat, Jul 8, 2017 at 2:51 AM, Paul Hammant <p...@hammant.org> wrote: > > > > > > 1. compression-exempt-suffixes = mp3,mp4,jpeg > > > > > > 2. deltification-exempt-suffixes = mp3,mp4,jpeg > > > > > > Regardless of the setting of 'compression-level', #1 above two mean > certain > > things can skip the compression attempt. It must give up at a certain > point > > right? > > > > > > Same for deltification re #2 > > > > > > I'm assuming debate happens now. Then y'all let me go off and > diligently > > file a Jira ticket for this feature request, or I slink away suitably > > admonished... > > > > > > - Paul > > > > I'm not sure whether this is going to be useful. How do you expect these > > exemptions to help Subversion users? What's the story? > > I agree partly. Skipping compression for known "incompressible" formats > like mpX, png or gif can come with performance benefits, saving some CPU > cycles (see the recent performance disccussions on this list) > > However, I'm not sure whether the same amounts for deltification. There > are editing tasks which do not reencode the whole image / movie, and they > can profit from deltification, for example: > > - Lossless rotation / cropping of jpeg images. > - Editing / stripping the EXIF data of jpeg images. > - Embedding / dropping the preview thumbnail of jpeg images. > - Lossless MP3 editing (e. G. via mp3DirectCut). > - Editing MP3 meta data (e. G. Song Title) > (... and more...) > > In all those cases, skipping deltification can drastically increase > storage. > > > Best regards > > Markus Schaber > > CODESYS® a trademark of 3S-Smart Software Solutions GmbH > > Inspiring Automation Solutions > > 3S-Smart Software Solutions GmbH > Dipl.-Inf. Markus Schaber | Product Development Core Technology > Memminger Str. 151 | 87439 Kempten | Germany > Tel. +49-831-54031-979 | Fax +49-831-54031-50 > > E-Mail: m.scha...@codesys.com | Web: http://www.codesys.com | CODESYS > store: http://store.codesys.com > CODESYS forum: http://forum.codesys.com > > Managing Directors: Dipl.Inf. Dieter Hess, Dipl.Inf. Manfred Werner | > Trade register: Kempten HRB 6186 | Tax ID No.: DE 167014915 > > This e-mail may contain confidential and/or privileged information. If you > are not the intended recipient (or have received > this e-mail in error) please notify the sender immediately and destroy > this e-mail. Any unauthorised copying, disclosure > or distribution of the material in this e-mail is strictly forbidden. >
