jonathandlynch wrote: > Why is LC 7 slower than 6?
There may be additional factors specific to the RPi build, but in general those differences were due to Unicode support and unoptimized refactoring related to that and other large-scale scopes of work.
With v9 much of the earlier performance drop has been regained, with key work on done common things like lineoffset and some other chunk expressions, arrays, and more.
Some rendering operations may still benefit from optimization, esp. on Windows, but overall I've not seen much in that area on Linux.
Given the larger data sizes of some Unicode strings you can still expect some performance loss in some areas, but in my experience nothing like moving from v6 to v7.
If you come across anything prohibitive please submit a bug report. The team has worked through a number of performance-related bug reports, and sometimes when they see a new recipe it'll alter them to opportunities they hadn't considered.
The lineoffset fix was among those. In v6 and earlier chunk delimiters could only be a single character, but v7 introduced multi-char delimiters. Kinda cool if you need it, but a more costly substring compare is needed to support that. With v8 they were able to fork the operation so that when a delimiter is only a single char it uses the older routine, saving the cooler-but-costlier substring compare only for when needed.
-- Richard Gaskin Fourth World Systems Software Design and Development for the Desktop, Mobile, and the Web ____________________________________________________________________ ambassa...@fourthworld.com http://www.FourthWorld.com _______________________________________________ use-livecode mailing list use-livecode@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-livecode
