From f48204eee20ddb0a3b23c10d27e3c75fbcd3f7f3 Mon Sep 17 00:00:00 2001
From: Kirill Chibisov <contact@kchibisov.com>
Date: Sat, 25 Jan 2020 02:42:23 +0300
Subject: [PATCH] Add font metric caching

---
 CHANGELOG.md                  | 1 +
 alacritty/src/renderer/mod.rs | 4 +---
 2 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 75c49bc..04323ba 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -37,6 +37,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Stack overflow when printing shader creation error
 - Underline position for bitmap fonts
 - Selection rotating outside of scrolling region
+- Throughput performance problems caused by excessive font metric queries
 
 ### Removed
 
diff --git a/alacritty/src/renderer/mod.rs b/alacritty/src/renderer/mod.rs
index 2a1d872..a099b0d 100644
--- a/alacritty/src/renderer/mod.rs
+++ b/alacritty/src/renderer/mod.rs
@@ -341,9 +341,7 @@ impl GlyphCache {
     }
 
     pub fn font_metrics(&self) -> font::Metrics {
-        self.rasterizer
-            .metrics(self.font_key, self.font_size)
-            .expect("metrics load since font is loaded at glyph cache creation")
+        self.metrics
     }
 
     // Calculate font metrics without access to a glyph cache