Re: [Dev-luatex] Speed of latest revisions

Nikolai Weibull wrote:

On 5/22/07, Taco Hoekwater wrote:

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Oliver Heins wrote:

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I noticed that the latest revisions (441/442) are very slow. I just switched back to rev 339, which runs much faster (approximated 10 times).

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Yes, that is (more or less) on purpose

Care to elaborate? Something new and interesting going on?

Hans and I are working on a new feature we call "attributes". An attribute is an item that becomes attached to the actual nodes that are to be typeset. These can then be queried and/or acted upon in the node processing callbacks, and could for instance be used for color, glyph substitution, storing annotations in the pdf, or even for re-linebreaking a paragraph. The abstract idea is pretty clear, but the literal implementation isn't -- it requires many small changes to the data structure and the routines that handle them. The current implementation (as started in #441) is pretty slow and wasteful on resources, to prevent bugs stemming from optimization from obscuring bugs caused by incorrect data structure assumptions. Hopefully all of this will be sorted out in a few days' time. Cheers, Taco