Am So., 14. Apr. 2019 um 23:01 Uhr schrieb Jahrme Risner <[email protected]>: > > Hello all, > > I recently saw that Andy Wingo (the primary maintainer of Guile) gave a talk > about the upcoming release of Guile 3 (projected for “Spring 2019”). > > https://www.gnu.org/software/guile/news/ > https://fosdem.org/2019/schedule/event/guile3fasterprograms/ > > Currently version 2.9.1 is serving as the beta release for version 3. > > For me, this announcement has raised a couple of questions: > > 1. What is the state of Guile 2 support right now? I know that there is a > configuration command that enables experimental support, but what are the > current limitations preventing the adoption of Guile 2 as the default version > of Guile? > > 2. I understand that part of the issue with Guile 2 was a slowdown in > performance due to the way in which LilyPond uses Guile; if substantiated, > would the alleged doubling in speed compared to 2.2 place Guile 3 as a better > candidate for the version of Guile to replace 1.8? > > More generally, if someone was interested in working on Guile support, where > would be the best place to start? Also, is there anyone who has been heading > the work on moving to a newer version of Guile? > > Best wishes, > Jahrme
Hi Jahrme, great you're interested in the topic. I'll try to give you some feedback to your questions. ad 1. If you do on master confirgure --enable-guile2 and apply the attached patches (some are in master already, if in doubt prefer what's in the source already) you'll get a working lilypond. Working means `make´, `make doc´ will succeed and it survives the regtest with very minor issues, for guile-2.2.x and guile-2.9.1 At least the last time I tested this. Disadvantges/issues are the slow-down. Other issues are listed here: https://ao2.it/tmp/lilypond-guile2/TODO Furthermore `procedure-source´ is disabled in guile-2, which is problematic for us. In general we have no method to deal with .go-files. And we're beaten by encoding-issues. There's are likely more ... ad 2. Though, the slow-down is still huge. I can't confirm a substantielly speed up for guile-2.9.1 Over the years several people worked on the topic. Speaking only for me, I think all low hanging fruits are done. And I don't have the knowledge to go deeper :( .go-files and encoding-thingies are the heaviest showstopper for now, all way out of my depth. If you want to start the above listed issues are the current TODO-list. Best, Harm
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