From 9a894206f6990eb5e0edc464dae02700a33d2348 Mon Sep 17 00:00:00 2001 From: Gregory Heytings Date: Tue, 19 Jul 2022 13:33:38 +0000 Subject: [PATCH] Improve the heuristic for long lines detection again. * src/xdisp.c (redisplay_window): Improve the heuristic again. --- src/xdisp.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/src/xdisp.c b/src/xdisp.c index 05fb008ff15..ee34487a444 100644 --- a/src/xdisp.c +++ b/src/xdisp.c @@ -19294,7 +19294,9 @@ redisplay_window (Lisp_Object window, bool just_this_one_p) /* Check whether the buffer to be displayed contains long lines. */ if (!NILP (Vlong_line_threshold) && !current_buffer->long_line_optimizations_p - && Z - BEG - BUF_UNCHANGED_SIZE (current_buffer) <= 1) + && (MODIFF - UNCHANGED_MODIFIED > 4 + || Z - BEG - BUF_UNCHANGED_SIZE (current_buffer) > 1 + || Z - BEG - BUF_UNCHANGED_SIZE (current_buffer) < -1)) { ptrdiff_t cur, next, found, max = 0; for (cur = 1; cur < Z; cur = next) -- 2.39.5