From 5651c2d96727749f8b19df4fda332bd8a2e6d823 Mon Sep 17 00:00:00 2001
From: khyperia <953151+khyperia@users.noreply.github.com>
Date: Sun, 22 Mar 2026 12:31:55 +0100
Subject: [PATCH] Optimize shape_until_scroll with large line count

---
 src/buffer.rs | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/src/buffer.rs b/src/buffer.rs
index d5f3540..14684f7 100644
--- a/src/buffer.rs
+++ b/src/buffer.rs
@@ -597,14 +597,13 @@ impl Buffer {
             let scroll_start = self.scroll.vertical;
             let scroll_end = scroll_start + self.height_opt.unwrap_or(f32::INFINITY);
 
-            let mut total_height = 0.0;
-            for line_i in 0..self.lines.len() {
-                if line_i < self.scroll.line {
-                    if prune {
-                        self.lines[line_i].reset_shaping();
-                    }
-                    continue;
+            if prune {
+                for line_i in 0..self.scroll.line {
+                    self.lines[line_i].reset_shaping();
                 }
+            }
+            let mut total_height = 0.0;
+            for line_i in self.scroll.line..self.lines.len() {
                 if total_height > scroll_end {
                     if prune {
                         self.lines[line_i].reset_shaping();