perf: add instance prop of SkimMatcherV2

This is so we are not crating an new instance of this each time we are
scoring a match.

rust/lib.rs

@@ -41,7 +41,7 @@ pub extern "C" fn ivy_match(c_pattern: *const c_char, c_text: *const c_char) ->
     let pattern = to_string(c_pattern);
     let text = to_string(c_text);
 
-    let m = matcher::Matcher{ pattern };
+    let m = matcher::Matcher::new( pattern );
     return m.score(text) as i32;
 }
 

rust/matcher.rs

@@ -4,12 +4,19 @@ use fuzzy_matcher::skim::SkimMatcherV2;
 pub struct Matcher {
     /// The search pattern that we want to match against some text
     pub pattern: String,
+    matcher: SkimMatcherV2,
 }
 
 impl Matcher {
+    pub fn new(pattern: String) -> Self {
+        return Self {
+            pattern,
+            matcher: SkimMatcherV2::default(),
+        }
+    }
+
     pub fn score(self: &Self, text: String) -> i64 {
-        let matcher = SkimMatcherV2::default();
+        if let Some((score, _indices)) =  self.matcher.fuzzy_indices(&text, &self.pattern) {
-        if let Some((score, _indices)) =  matcher.fuzzy_indices(&text, &self.pattern) {
             return score;
         }
 

rust/sorter.rs

@@ -23,7 +23,7 @@ impl Options {
 
 pub fn sort_strings(options: Options, strings: Vec<String>) -> Arc<Mutex<Vec<Match>>> {
     let matches: Arc<Mutex<Vec<Match>>> = Arc::new(Mutex::new(Vec::new()));
-    let matcher = Arc::new(Mutex::new(matcher::Matcher{ pattern: options.pattern }));
+    let matcher = Arc::new(Mutex::new(matcher::Matcher::new(options.pattern)));
 
     let pool = thread_pool::ThreadPool::new(std::thread::available_parallelism().unwrap().get());