Only compile the regex once

src/main.rs

@@ -5,6 +5,7 @@ mod utils;
 use std::fmt::{Display, Formatter};
 use eyre::Result;
 use clap::Parser;
+use regex::Regex;
 use walkdir::{DirEntry, WalkDir};
 
 use args::Args;
@@ -47,9 +48,11 @@ fn main() -> Result<()> {
         error: 0,
     };
 
+    let regex = Regex::new(SERIES_REGEX).unwrap();
+
     for entry in WalkDir::new(params.path) {
         if let Ok(file) = entry {
-            check_file(file, &mut stats, params.no_emoji, params.show_success);
+            check_file(file, &mut stats, &regex, params.no_emoji, params.show_success);
         }
     }
 
@@ -58,11 +61,11 @@ fn main() -> Result<()> {
     Ok(())
 }
 
-fn check_file(file: DirEntry, stats: &mut Stats, no_emoji: bool, show_success: bool) -> () {
+fn check_file(file: DirEntry, stats: &mut Stats, regex: &Regex, no_emoji: bool, show_success: bool) -> () {
     let file_type = file.file_type();
     if file_type.is_file() {
         let filename = file.file_name().to_str().unwrap();
-        match lint_file_name(&file, filename) {
+        match lint_file_name(&file, filename, regex) {
             ComplianceStatus::NotMatched => {
                 stats.files += 1;
                 stats.error += 1;
@@ -87,7 +90,7 @@ fn check_file(file: DirEntry, stats: &mut Stats, no_emoji: bool, show_success: b
     }
 }
 
-fn lint_file_name(file: &DirEntry, filename: &str) -> ComplianceStatus {
+fn lint_file_name(file: &DirEntry, filename: &str, regex: &Regex) -> ComplianceStatus {
     if let Some(ext) = file.path().extension() {
         if !VIDEO_EXTENSIONS.contains(&ext.to_str().unwrap()) {
             return ComplianceStatus::Ignored;
@@ -96,7 +99,7 @@ fn lint_file_name(file: &DirEntry, filename: &str) -> ComplianceStatus {
         return ComplianceStatus::Ignored;
     }
 
-    let captures = regex::Regex::new(SERIES_REGEX).unwrap().captures(filename);
+    let captures = regex.captures(filename);
 
     if captures.is_none() {
         return ComplianceStatus::NotMatched;