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 font files are here: http://tug.org/~hvoss/Sparks-Bar-Medium.otf http://tug.org/~hvoss/Sparks-Dotline-Medium.otf -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 \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