Optimize path decoration with redundancy check#1439
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Added redundancy check to avoid unnecessary moveto commands. (see https://tex.stackexchange.com/q/761240/399147)
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On 2026-06-15 a more comprehensive testsuite was introduced for PGF/TikZ. This tests all new contributions against the examples extracted from the manual and checks whether anything has changed to avoid regressions. Since this pull request was opened before that, these tests were not run automatically. I have run Tip Your pull request might have failed some tests. This does not mean that your contribution will be rejected. In fact, depending on the changes you propose, it might even be expected that some tests fail, however, this needs to be evaluated carefully. Failed tests
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Instruct the decoration automaton to drop any moveto that is purely redundant by updating
\pgf@path@last...to\pgfpoint@decorate@existingpathlastand evaluates the x and y coordinates against\pgf@path@last...counterparts to suppress unnecessary moveto operations.Motivation for this change
First reported in https://tex.stackexchange.com/q/761240/399147, nested decorations in the
decoratesubpath disconnect them from the rest of the path. The effect is most visible with--cycle.Checklist
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