Daneel cd16d45584 patches: fix O(buffer) cache invalidation caused by font-lock ...

BUF_CHARS_MODIFF fix — the core performance regression:
ensureTextCache checked BUF_MODIFF which font-lock bumps on every
redisplay. Each cursor movement in a large file triggered full buffer
rebuild. Now uses BUF_CHARS_MODIFF (changes only on char insert/delete).

2026-03-01 04:56:37 +01:00

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