From 75df916d97d9eb6380083c022b0fe4c8ecfa26c9 Mon Sep 17 00:00:00 2001
From: Stanislav Pastushenko <staspast1@gmail.com>
Date: Tue, 2 Dec 2025 19:32:31 +0100
Subject: [PATCH] memory optimisation

---
 src/search.rs      |  7 ++-----
 src/types.rs       |  3 ++-
 src/ui/log_view.rs | 10 ++++++++--
 3 files changed, 12 insertions(+), 8 deletions(-)

diff --git a/src/search.rs b/src/search.rs
index d97063d..a849d35 100644
--- a/src/search.rs
+++ b/src/search.rs
@@ -141,13 +141,10 @@ fn search_lines(
             // Read lines in this chunk efficiently (one seek, sequential reads)
             let lines = line_index.read_line_range(&mut file_handle, *start, *end);
 
-            // Process each line
+            // Process each line - only store line numbers, not content
             for (line_number, content) in lines {
                 if params.matches_line(&content, &regex_matcher) {
-                    chunk_results.push(FilteredLine {
-                        line_number,
-                        content,
-                    });
+                    chunk_results.push(FilteredLine { line_number });
                 }
             }
 
diff --git a/src/types.rs b/src/types.rs
index 2a9bc56..2362430 100644
--- a/src/types.rs
+++ b/src/types.rs
@@ -7,8 +7,9 @@ pub struct HighlightRule {
     pub enabled: bool,
 }
 
+// Filtered lines now only store line numbers to save memory
+// Content is loaded on-demand when rendering
 #[derive(Clone)]
 pub struct FilteredLine {
     pub line_number: usize,
-    pub content: String,
 }
diff --git a/src/ui/log_view.rs b/src/ui/log_view.rs
index 09dc38a..ce17d2a 100644
--- a/src/ui/log_view.rs
+++ b/src/ui/log_view.rs
@@ -161,15 +161,21 @@ fn render_visible_lines(
 
 fn get_line_content(tab: &mut FileTab, show_all: bool, display_idx: usize) -> (usize, String) {
     if show_all {
+        // Main view: read line by display index
         let content = tab
             .line_index
             .read_line(&mut tab.file_handle, display_idx)
             .unwrap_or_default();
         (display_idx, content)
     } else {
+        // Filtered view: get line number from filtered list, then read content on-demand
         if display_idx < tab.filtered_lines.len() {
-            let filtered = &tab.filtered_lines[display_idx];
-            (filtered.line_number, filtered.content.clone())
+            let line_number = tab.filtered_lines[display_idx].line_number;
+            let content = tab
+                .line_index
+                .read_line(&mut tab.file_handle, line_number)
+                .unwrap_or_default();
+            (line_number, content)
         } else {
             (0, String::new())
         }