> Phil Holmes wrote Thursday, April 16, 2015 3:43 PM >> >> From: "Trevor Daniels" <t.dani...@treda.co.uk> >> Sent: Thursday, April 16, 2015 3:28 PM >>> >>> Phil Holmes wrote Thursday, April 16, 2015 2:00 PM >>> >>>> The performance of LilyPond 2.19.18 on Windows is _much_ better than >>>> previous versions. Some examples: >>>> >>>> A 26 page multi-score piece I've been working on: >>>> 2.19.16: 114s to compile >>>> 2.19.18: 52s >>> ... [etc] >>> >>> That's remarkable. I can see no change between 2.19.16 >>> and 2.19.18 that might account for this enormous change. >>> The only effect of this magnitude which I've seen in the >>> past is to do with setting up the font library when LP >>> is run for the first time. But that would be an increase. >>> >>> Any chance your 2.19.18 is using a different hard disk, >>> an SSD maybe, which the others weren't? >> >> No. They're all installed on an SSD. It's CPU limited anyway. >> >> I thought 2.19.16 might be quicker because of the change to the compiler, >> but, as you say, have no idea why .18 is so much quicker than .16. I'm >> pretty certain it's a genuine difference: I only noticed because the score I >> was working on suddenly appeared more quickly! > > Well, I remain mystified, but I can confirm the speedup on my Windows Vista > laptop with a 4-page score: > > With 2.19.16 this took 25.2 22.6 22.9 secs > With 2.19.18 this took 12.6 12.5 11.8 secs > > It is amazing, but very welcome! In my career as a systems programmer, in > the days when performance was critical, I never saw an improvement of this > magnitude resulting from (presumably) a single change. Usually we were > struggling to gain a percent or two. > > Were there any changes to GUB between .16 and .18?
Further to this, I first established that the speed-up on Windows happened between 2.19.17 and 2.19.18. One possibly relevant change between those two releases was the move from gs 8.70 to gs 9.15. This increased the size of usr/bin from 49.2Mb to 58.1Mb, virtually all of the increase being in the three gs files, so this looks like a pretty significant upgrade. Checking the GhostScript website for release 9 suggests it includes performance improvements and major changes to font handling. This looks a possible candidate, installed courtesy of Masamichi HOSODA-san. If so, yet more thanks and kudos to you, Masamichi! But wouldn't this show a speed-up on systems other than Windows? Trevor _______________________________________________ lilypond-user mailing list lilypond-user@gnu.org https://lists.gnu.org/mailman/listinfo/lilypond-user
