From 5e04f9c5c370363c50233225fb6377671cff0aa9 Mon Sep 17 00:00:00 2001
From: Ian Rettig <irettig@misoenergy.org>
Date: Fri, 6 Jun 2025 14:23:49 -0400
Subject: [PATCH] Feat: Use BufReader for better io efficiency.

---
 src/main.rs | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/src/main.rs b/src/main.rs
index 686c351..15f3132 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,4 +1,6 @@
 use clap::Parser;
+use std::fs::File;
+use std::io::{BufRead, BufReader};
 
 // Search for a pattern in a file and display the lines that contain it.
 #[derive(Parser)]
@@ -7,14 +9,19 @@ struct Cli {
     path: std::path::PathBuf,
 }
 
-fn main() {
+fn main() -> std::io::Result<()> {
     let args = Cli::parse();
 
-    let content = std::fs::read_to_string(&args.path).expect("Could not read file.");
+    let f = File::open(&args.path)?;
+    let mut reader = BufReader::new(f);
+    let mut line = String::new();
 
-    for line in content.lines() {
+    while reader.read_line(&mut line)? > 0 {
         if line.contains(&args.pattern) {
             println!("{}", line)
         }
+        line.clear();
     }
+
+    Ok(())
 }