Something smells rotten in the state of luametatex...

Something smells rotten in the state of luametatex...

[Thomas A. Schmitz via ntg-context]

Hi all,

I have a document here for one of my classes: xml processed via context, 
some layers, some two column paragraphs, a bibliography, nothing out of 
the ordinary. With mkiv, it compiles cleanly:

mkiv lua stats  > used engine: luatex version: 1.13, functionality 
level: 7420, banner: this is luatex, version 1.13.0 (tex live 2021)
mkiv lua stats  > used hash slots: 48846 of 65536 + 250000
mkiv lua stats  > lua properties: engine: lua 5.3, used memory: 212 MB, 
ctx: 210 MB, max: unknown MB, hash chars: min(64,40), symbol mask: utf (τεχ)
mkiv lua stats  > runtime: 2.775 seconds, 119 processed pages, 119 
shipped pages, 42.883 pages/second
system          | total runtime: 5.996 seconds

When I compile the same document with luametatex, things slow down to a 
crawl:

mkiv lua stats  > used engine: luametatex version: 2.0921, functionality 
level: 20210903, format id: 594, compiler: gcc
mkiv lua stats  > tex properties: 740039 hash slots used of 2097152, 
48372 control sequences, approximate memory usage: 36 MB
mkiv lua stats  > lua properties: engine: lua 5.4, used memory: 100 MB, 
ctx: 93 MB, max: 138 MB, symbol mask: utf (τεχ)
mkiv lua stats  > runtime: 27.509 seconds, 119 processed pages, 119 
shipped pages, 4.326 pages/second
system          | total runtime: 139.458 seconds of 139.493 seconds

So, it takes more than 20 times as long... The CPU of my computer goes 
up to 100 %, and the entire machine sometimes becomes unresponsive 
during the run. Obviously, I can't provide a MWE, but this seems 
bizarre. One thing I see on my terminal: there are hundreds of lines 
like this

Overfull \hbox (0.8pt too wide) in paragraph at lines 18--18
6:17:  [glue][glue]<l2r par><l2r 
[glue][boundary][hlist][penalty][glue][hlist][penalty] >[glue][glue]

It's almost like some debug setting has been triggered. But that may be 
a red herring. Anyway, I just wanted to report this; maybe some bigger 
problem (with the binary or the format?) is lurking somewhere.

All best

Thomas
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Re: Something smells rotten in the state of luametatex...

[Hans Hagen via ntg-context]

On 10/8/2021 6:09 PM, Thomas A. Schmitz via ntg-context wrote:
> 
> Hi all,
> 
> I have a document here for one of my classes: xml processed via context, 
> some layers, some two column paragraphs, a bibliography, nothing out of 
> the ordinary. With mkiv, it compiles cleanly:
> 
> mkiv lua stats  > used engine: luatex version: 1.13, functionality 
> level: 7420, banner: this is luatex, version 1.13.0 (tex live 2021)
> mkiv lua stats  > used hash slots: 48846 of 65536 + 250000
> mkiv lua stats  > lua properties: engine: lua 5.3, used memory: 212 MB, 
> ctx: 210 MB, max: unknown MB, hash chars: min(64,40), symbol mask: utf 
> (τεχ)
> mkiv lua stats  > runtime: 2.775 seconds, 119 processed pages, 119 
> shipped pages, 42.883 pages/second
> system          | total runtime: 5.996 seconds
> 
> When I compile the same document with luametatex, things slow down to a 
> crawl:
> 
> mkiv lua stats  > used engine: luametatex version: 2.0921, functionality 
> level: 20210903, format id: 594, compiler: gcc
> mkiv lua stats  > tex properties: 740039 hash slots used of 2097152, 
> 48372 control sequences, approximate memory usage: 36 MB
> mkiv lua stats  > lua properties: engine: lua 5.4, used memory: 100 MB, 
> ctx: 93 MB, max: 138 MB, symbol mask: utf (τεχ)
> mkiv lua stats  > runtime: 27.509 seconds, 119 processed pages, 119 
> shipped pages, 4.326 pages/second
> system          | total runtime: 139.458 seconds of 139.493 seconds
> 
> So, it takes more than 20 times as long... The CPU of my computer goes 
> up to 100 %, and the entire machine sometimes becomes unresponsive 
> during the run. Obviously, I can't provide a MWE, but this seems 
> bizarre. One thing I see on my terminal: there are hundreds of lines 
> like this
> 
> Overfull \hbox (0.8pt too wide) in paragraph at lines 18--18
> 6:17:  [glue][glue]<l2r par><l2r 
> [glue][boundary][hlist][penalty][glue][hlist][penalty] >[glue][glue]
> 
> It's almost like some debug setting has been triggered. But that may be 
> a red herring. Anyway, I just wanted to report this; maybe some bigger 
> problem (with the binary or the format?) is lurking somewhere.
no, that's just a more verbose 'overfull box' message ... does adding 
\dontcomplain help? (After all you can live with .8pt which smells like 
2 * .4pt which is the default rule width so maybe some frame stricks out)

Hans

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                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
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