@import url("/assets/md.css")fix: improve performance without mutlithreading by ~50x

@import url("/assets/md.css")this is done by LazyLocking the system fonts loading code
performance increase was done by comparing the output of time target/release/batacli on a 64GB DDR4 RAM, Linux x86_64 system with an NVME SSD.
raw results:

this commit: 4.93s user 2.54s system 98% cpu 7.561 total
previous commit: 63.19s user 307.15s system 97% cpu 6:18.31 total

1 files changed, 8 insertions, 12 deletions

diff --git a/src/main.rs b/src/main.rs
index fed8090..45d459b 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,4 +1,4 @@
-use std::{fs, io::Result, os::unix};
+use std::{fs, io::Result, os::unix, sync::LazyLock};
 
 use serde::{Deserialize, Serialize};
 use tiny_skia::Pixmap;
@@ -55,18 +55,14 @@ pub struct BibataColourScheme<'a> {
   pub watch_opacity: f32,
 }
 
-fn vector_to_pixmap(svg_data: &[u8]) -> Pixmap {
-  let tree = {
-    let mut opt = usvg::Options::default();
-    // Get file's absolute directory.
-    // opt.resources_dir = std::fs::canonicalize(&args[1])
-    //   .ok()
-    //   .and_then(|p| p.parent().map(|p| p.to_path_buf()));
-
-    opt.fontdb_mut().load_system_fonts();
+static USVG_OPTIONS: LazyLock<usvg::Options> = LazyLock::new(||{
+  let mut opt = usvg::Options::default();
+  opt.fontdb_mut().load_system_fonts();
+  opt
+});
 
-    usvg::Tree::from_data(svg_data, &opt).unwrap()
-  };
+fn vector_to_pixmap(svg_data: &[u8]) -> Pixmap {
+  let tree = usvg::Tree::from_data(svg_data, &*USVG_OPTIONS).unwrap();
 
   let pixmap_size = tree.size().to_int_size();
   let mut pixmap = tiny_skia::Pixmap::new(pixmap_size.width(), pixmap_size.height()).unwrap();