Use fnv for caches

Cargo.lock

@@ -874,6 +874,7 @@ dependencies = [
  "bdf",
  "confy",
  "env_logger",
+ "fnv",
  "hex_color",
  "log",
  "mio-extras",

Cargo.toml

@@ -11,6 +11,7 @@ description = "A bare-bones terminal emulator that is not meant to be taken too
 alacritty_terminal = "0.16"
 confy = "0.5"
 env_logger = "0.9"
+fnv = "1.0"
 hex_color = { version = "2", features = ["serde"] }
 log = "0.4"
 mio-extras = "2"

src/graphics.rs

@@ -2,8 +2,8 @@ use alacritty_terminal::ansi::{Color, NamedColor};
 use alacritty_terminal::term::cell::{Cell, Flags as CellFlags};
 use alacritty_terminal::term::color::{Colors, Rgb};
 use alacritty_terminal::Term;
+use fnv::FnvHashMap as HashMap;
 use softbuffer::GraphicsContext;
-use std::collections::HashMap;
 use winit::window::Window;
 
 use crate::config::{ColorConfig, Config, FontConfig};