perf: Canonicalize ignored absolute path only once

src/dir_walker.rs

@@ -132,19 +132,14 @@ fn is_ignored_path(path: &Path, walk_data: &WalkData) -> bool {
     }
 
     // Entry is inside an ignored absolute path
+    // Absolute paths should be canonicalized before being added to `WalkData.ignore_directories`
     for ignored_path in walk_data.ignore_directories.iter() {
         if !ignored_path.is_absolute() {
             continue;
         }
-        match std::fs::canonicalize(ignored_path) {
-            Ok(absolute_ignored_path) => {
-                let absolute_entry_path =
-                    std::fs::canonicalize(path).unwrap_or_default();
-                if absolute_entry_path.starts_with(absolute_ignored_path) {
-                    return true;
-                }
-            }
-            Err(_) => continue,
+        let absolute_entry_path = std::fs::canonicalize(path).unwrap_or_default();
+        if absolute_entry_path.starts_with(ignored_path) {
+            return true;
         }
     }
 

src/main.rs

@@ -29,6 +29,7 @@ use std::sync::atomic::Ordering;
 use std::sync::Arc;
 use std::sync::Mutex;
 use sysinfo::{System, SystemExt};
+use utils::canonicalize_absolute_path;
 
 use self::display::draw_it;
 use config::get_config;
@@ -198,6 +199,7 @@ fn main() {
         Some(values) => values
             .map(|v| v.as_str())
             .map(PathBuf::from)
+            .map(canonicalize_absolute_path)
             .collect::<Vec<PathBuf>>(),
         None => vec![],
     };

src/utils.rs

@@ -67,6 +67,18 @@ pub fn normalize_path<P: AsRef<Path>>(path: P) -> PathBuf {
     path.as_ref().components().collect()
 }
 
+// Canonicalize the path only if it is an absolute path
+pub fn canonicalize_absolute_path(path: PathBuf) -> PathBuf {
+    if path.is_absolute() {
+        match std::fs::canonicalize(&path) {
+            Ok(canonicalized_path) => canonicalized_path,
+            Err(_) => path,
+        }
+    } else {
+        path
+    }
+}
+
 pub fn is_filtered_out_due_to_regex(filter_regex: &[Regex], dir: &Path) -> bool {
     if filter_regex.is_empty() {
         false