From 034dd1277e8bb247efc109e30943d3d97c938270 Mon Sep 17 00:00:00 2001
From: DaniPopes <57450786+DaniPopes@users.noreply.github.com>
Date: Fri, 1 Nov 2024 14:00:37 +0100
Subject: [PATCH] perf(anstyle): avoid using write! macro with single `str`

---
 crates/anstyle/src/color.rs  | 10 ++++------
 crates/anstyle/src/effect.rs |  3 +--
 crates/anstyle/src/reset.rs  |  2 +-
 3 files changed, 6 insertions(+), 9 deletions(-)

diff --git a/crates/anstyle/src/color.rs b/crates/anstyle/src/color.rs
index a9aafb5a..b930a020 100644
--- a/crates/anstyle/src/color.rs
+++ b/crates/anstyle/src/color.rs
@@ -627,19 +627,17 @@ impl DisplayBuffer {
 impl core::fmt::Display for DisplayBuffer {
     #[inline]
     fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
-        let s = self.as_str();
-        write!(f, "{s}")
+        f.write_str(self.as_str())
     }
 }
 
 #[derive(Copy, Clone, Default, Debug)]
-struct NullFormatter<D: core::fmt::Display>(D);
+struct NullFormatter(&'static str);
 
-impl<D: core::fmt::Display> core::fmt::Display for NullFormatter<D> {
+impl core::fmt::Display for NullFormatter {
     #[inline]
     fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
-        let d = &self.0;
-        write!(f, "{d}")
+        f.write_str(self.0)
     }
 }
 
diff --git a/crates/anstyle/src/effect.rs b/crates/anstyle/src/effect.rs
index 1a80fa3e..507dfc83 100644
--- a/crates/anstyle/src/effect.rs
+++ b/crates/anstyle/src/effect.rs
@@ -323,8 +323,7 @@ impl core::fmt::Display for EffectsDisplay {
     #[inline]
     fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
         for index in self.0.index_iter() {
-            let escape = METADATA[index].escape;
-            write!(f, "{escape}")?;
+            f.write_str(METADATA[index].escape)?;
         }
         Ok(())
     }
diff --git a/crates/anstyle/src/reset.rs b/crates/anstyle/src/reset.rs
index 62c8b4bc..5a4a5f75 100644
--- a/crates/anstyle/src/reset.rs
+++ b/crates/anstyle/src/reset.rs
@@ -15,7 +15,7 @@ impl Reset {
 
 impl core::fmt::Display for Reset {
     fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
-        write!(f, "{RESET}")
+        f.write_str(RESET)
     }
 }