Optimize crates index generation (reduce 0.4% file size)

rust/src/minify.rs

@@ -17,7 +17,10 @@ struct FrequencyWord {
 impl FrequencyWord {
     #[inline]
     fn score(&self) -> usize {
-        self.word.len() * self.frequency
+        // Due to the prefix + suffix occupying two letters,
+        // we should minus the length to calculate the score.
+        // This will lead to a 0.4% reduction in file size.
+        (self.word.len() - 2) * self.frequency
     }
 }
 
@@ -66,9 +69,9 @@ impl Minifier {
 
         Minifier {
             mapping: words
-                .iter()
+                .into_iter()
                 .enumerate()
-                .map(|(index, fw)| (fw.word.clone(), keys.get(index).unwrap().to_owned()))
+                .map(|(index, fw)| (fw.word, keys.get(index).unwrap().to_owned()))
                 .collect(),
         }
     }

rust/src/tasks/crates.rs

@@ -104,6 +104,7 @@ fn read_csv<D: DeserializeOwned>(file: impl Read) -> crate::Result<Vec<D>> {
 
 fn generate_javascript_crates_index(crates: Vec<Crate>, minifier: &Minifier) -> String {
     let mut contents = String::from("var N=null;");
+    // <name, [optional description, version]>
     let crates_map: HashMap<String, (Option<String>, Version)> = crates
         .into_par_iter()
         .map(|item| {

rust/src/tasks/lints.rs

@@ -75,7 +75,7 @@ impl LintsTask {
                     .as_ref()
                     .and_then(|d| d.trim().strip_prefix("### What it does"))
                 {
-                    let mut desc = docs.replace('`', "").replace('#', "");
+                    let mut desc = docs.replace(['`', '#'], "");
                     desc.truncate(100);
                     Some((lint.id.clone(), [lint.level.to_string(), desc]))
                 } else {