Re: LilyPond can't engrave 16 pages of music

[Aaron Hill]

On 2018-12-21 4:28 pm, Karlin High wrote:
> On 12/21/2018 5:56 PM, Kieren MacMillan wrote:
> > > It's
> > > only 16 pages and LilyPond crashes.
> > That looks like a [serious] bug to me. I’ve cc'ed the bug list.
>
> Reproduced crash on LilyPond 2.19.80, Windows 7 Pro 64-bit SP1, Intel
> Core i5-3450, 24GB RAM.
>
> At crash, lilypond-windows.exe in Task Manager as showing 1,080,744K
> of Memory (Private Working Set.) Perhaps this problem is similar to
> other large-memory-use crashes reported lately on Windows?

Almost definitely.  I ran this in using my setup which is 64-bit Linux 
LilyPond running under WSL on 64-bit Windows 10.  Peak memory usage 
during compilation was around 4.4GiB, so there is no way a 32-bit 
process could do this.

It took my computer about two minutes to process all 3000 measures, 
which by the way typeset to 25 pages in the end--many of which are 
virtually identical save for page and measure numbers.

I tried the following approach to break up the piece into three scores:

%%%%
\score {
  { \time 4/4 \repeat unfold 1000 { c4 d e f } }
}
\score {
  { \set Score.currentBarNumber = #1001 \bar ""
    \time 4/4 \repeat unfold 1000 { f1 } }
  \layout { indent = 0 }
}
\score {
  { \set Score.currentBarNumber = #2001 \bar ""
    \time 4/4 \repeat unfold 1000 { c4 d e f } }
  \layout { indent = 0 }
}
%%%%

This only took 42 seconds to complete and I believe it peaked under 
2GiB.

-- Aaron Hill