Hi, I'm (occasionally) trying to 'minimize' bottlenecks in the context / luametatex code. This is kind of hard because both are rather efficient already. On regular runs performance is probably okay but there are cases when one has a large complex document (e.g. with many tables) or has many runs (e.g. thousands of documents in one go). In that case even minor speedups can accumulate and become measurable (esp on vms and runs over a network). It can safe time and also energy (which can matter todays KWh pricing). So the challenge is how to determine bottlenecks. Are there users on this list that have document runs of more than 10 seconds (as reference: the luametatex manual takes < 9 seconds for 350 pages and loads plenty fonts and has many tables) or have many (small) runs and are annoyed by the runtime? And if so, what does one guess are the bottlenecks? Hans ps. Much runtime is spent in Lua and there is not that much we can do about making that faster. ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl -----------------------------------------------------------------