From ea587c23c6a6079bb0b7714e33775b067df3a129 Mon Sep 17 00:00:00 2001
From: Hana <andywangsy@gmail.com>
Date: Tue, 10 Dec 2024 19:44:55 +0800
Subject: [PATCH] perf: toString

---
 src/helpers.rs |  3 +--
 src/rope.rs    | 12 ++++++------
 2 files changed, 7 insertions(+), 8 deletions(-)

diff --git a/src/helpers.rs b/src/helpers.rs
index 6f27db0d..9fc7b296 100644
--- a/src/helpers.rs
+++ b/src/helpers.rs
@@ -1,7 +1,6 @@
 use std::{
   borrow::{BorrowMut, Cow},
   cell::{OnceCell, RefCell},
-  fmt::Display,
   marker::PhantomData,
   ops::Range,
 };
@@ -1287,7 +1286,7 @@ pub fn stream_and_get_source_and_map<'a, S: StreamChunks>(
   (generated_info, map)
 }
 
-pub trait SourceText<'a>: Default + Clone + Display {
+pub trait SourceText<'a>: Default + Clone + ToString {
   fn split_into_lines(&self) -> impl Iterator<Item = Self>;
   fn len(&self) -> usize;
   fn ends_with(&self, value: &str) -> bool;
diff --git a/src/rope.rs b/src/rope.rs
index 8549c688..2da1d23a 100644
--- a/src/rope.rs
+++ b/src/rope.rs
@@ -2,7 +2,6 @@ use std::{
   borrow::Cow,
   cell::RefCell,
   collections::VecDeque,
-  fmt::Display,
   hash::Hash,
   ops::{Bound, RangeBounds},
   rc::Rc,
@@ -415,15 +414,16 @@ impl Default for Rope<'_> {
   }
 }
 
-impl Display for Rope<'_> {
-  fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+impl ToString for Rope<'_> {
+  fn to_string(&self) -> String {
     match &self.0 {
-      Repr::Simple(s) => write!(f, "{}", s),
+      Repr::Simple(s) => s.to_string(),
       Repr::Complex(data) => {
+        let mut s = String::with_capacity(self.len());
         for (chunk, _) in data.iter() {
-          write!(f, "{}", chunk)?;
+          s.push_str(chunk);
         }
-        Ok(())
+        s
       }
     }
   }