diff --git a/src/api/auth.rs b/src/api/auth.rs
index 9c3956b..9e75f01 100644
--- a/src/api/auth.rs
+++ b/src/api/auth.rs
@@ -34,10 +34,14 @@ fn validate_username(username: &str) -> Result<(), String> {
     Ok(())
 }
 
+#[cfg(feature = "server")]
+static EMAIL_REGEX: std::sync::LazyLock<regex::Regex> = std::sync::LazyLock::new(|| {
+    regex::Regex::new(r"^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$").unwrap()
+});
+
 #[cfg(feature = "server")]
 fn validate_email(email: &str) -> Result<(), String> {
-    let re = regex::Regex::new(r"^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$").unwrap();
-    if !re.is_match(email) {
+    if !EMAIL_REGEX.is_match(email) {
         return Err("邮箱格式不正确".to_string());
     }
     Ok(())
diff --git a/src/api/comments/helpers.rs b/src/api/comments/helpers.rs
index 297a0bb..fc3e548 100644
--- a/src/api/comments/helpers.rs
+++ b/src/api/comments/helpers.rs
@@ -109,11 +109,15 @@ pub fn validate_comment_name(name: &str) -> Result<(), String> {
     Ok(())
 }
 
+#[cfg(feature = "server")]
+static EMAIL_REGEX: std::sync::LazyLock<regex::Regex> = std::sync::LazyLock::new(|| {
+    regex::Regex::new(r"^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$").unwrap()
+});
+
 /// 校验评论作者邮箱格式。
 #[cfg(feature = "server")]
 pub fn validate_comment_email(email: &str) -> Result<(), String> {
-    let re = regex::Regex::new(r"^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$").unwrap();
-    if !re.is_match(email.trim()) {
+    if !EMAIL_REGEX.is_match(email.trim()) {
         return Err("邮箱格式不正确".to_string());
     }
     Ok(())