On 4/12/2019 3:17 PM, Herbert Voss wrote:

Hello all,

If I run the following document on a 8 GByte RAM Linux machine. It takes more than 30 minutes until luaotfload has build the cache for Sparks-Dotline-Medium.otf. If I run another Program in the background that it never ends (too less memory). On my Mac the first run with context (upcoming TL2019) needs 9.5 Gbyte memory and nearly 100% CPU load to scan the Sparks-Dotline font. This one is, of course, 400 kB big, but why do we need more than 8 GByte Ram??

- the cpu load is puzzling: assuming that you have multiple cores, luatex will only use one core - the 30 min on linux is probably due to swapping - the 8 gig in general is a side effect of the way this font is using pair positioning (half a billion pairs due to classes where most pairs are dummies)

The font files are here:

http://tug.org/~hvoss/Sparks-Bar-Medium.otf http://tug.org/~hvoss/Sparks-Dotline-Medium.otf

i hacked a faster solution for such fonts (now I need some 25 sec for the initial caching so probably less on your machine and < 0.1 sec for loading the cached font)

-rw-r--r-- 1 voss voss  34412 Apr 11 18:54 Sparks-Bar-Medium.otf -rw-r--r-- 1 voss voss 403776 Apr 11 18:54 Sparks-Dotline-Medium.otf

These make a pretty good case for using proper drawing package,

\definefont[sparkBarMedium][file:Sparks-Bar-Medium.otf:mode=node;+calt] \definefont[sparkDotlineMedium][file:Sparks-Dotline-Medium.otf:mode=node;+calt]

\starttext Text {\sparkBarMedium{14,95,68,9,19,41,91,1,81,97,79,45,96,76,17,65,8,92}} Text

Text {\sparkDotlineMedium{14,95,68,9,19,41,91,1,81,97,79,45,96,76,17,65,8,92}} Text

\stoptext

Herbert ___________________________________________________________________________________

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