Am Montag, dem 12.04.2021 um 09:00 +0200 schrieb Werner LEMBERG: > > > Almost all developers use a Unix-like OS and can be thus served > > > with Guile 1.8.x! Are there actually LilyPond developers who > > > work > > > natively with Windows or MacOS? With 'natively' I mean using a > > > binary specifically compiled for that platform and not a virtual > > > box. > > > > Adding a mix of Guile versions will make the situation much worse > > because we know for sure that 1.8 and 2.2 are sufficiently > > different > > that it can cause bugs on their own. > > While this is true, I believe... > > > Claiming support for both will make reproducing issues much harder, > > and things will get outright horrible if, say, we continue to offer > > 32 bit for Windows using Guile 1.8 and 64 bit with Guile 2.2. > > ... that this is greatly exaggerated. AFAICS, we have managed that > quite well up to now (partially due to your heroic efforts).
Yes, because nobody uses it. Just look at the number of GC related crashes that I fixed in the past months, and I know of at least two more that I didn't get the chance to analyze in full detail yet. > > > Also consider what this means for extension writers: They'll have > > to take two Guile versions into account and possibly test both of > > them. I fear this split will be equally bad as Python 2 vs 3 was > > over years... > > Are the differences for users really that significant? Looking into > LilyPond's `scm` directory I only see very low-level stuff that needs > explicit use of `guile-2`. Maybe not as bad as Python 2 vs 3, but there are differences and heavy use of Scheme will break. > Note that I don't want that we stay with Guile 1.8 forever, but the > slowness of 2.x and 3.x is a serious issue. To sacrifice this still > enormous speed advantage just for the sake of orthodoxy seems wrong > to me. So 10% performance regression for users is enormous? What would be acceptable, in your opinion? After all, this was the *real* purpose of this thread, which nobody bothered answering so far. Jonas
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