diff --git a/clash_lib/src/app/dispatcher/tracked.rs b/clash_lib/src/app/dispatcher/tracked.rs
index b6bc9491e..4e7ba27d1 100644
--- a/clash_lib/src/app/dispatcher/tracked.rs
+++ b/clash_lib/src/app/dispatcher/tracked.rs
@@ -119,11 +119,12 @@ pub struct TrackedStream {
 }
 
 impl TrackedStream {
+    #[allow(clippy::borrowed_box)]
     pub async fn new(
         inner: BoxedChainedStream,
         manager: Arc<Manager>,
         sess: Session,
-        #[allow(clippy::borrowed_box)] rule: Option<&Box<dyn RuleMatcher>>,
+        rule: Option<&Box<dyn RuleMatcher>>,
     ) -> Self {
         let uuid = uuid::Uuid::new_v4();
         let chain = inner.chain().clone();
@@ -355,11 +356,12 @@ pub struct TrackedDatagram {
 }
 
 impl TrackedDatagram {
+    #[allow(clippy::borrowed_box)]
     pub async fn new(
         inner: BoxedChainedDatagram,
         manager: Arc<Manager>,
         sess: Session,
-        #[allow(clippy::borrowed_box)] rule: Option<&Box<dyn RuleMatcher>>,
+        rule: Option<&Box<dyn RuleMatcher>>,
     ) -> Self {
         let uuid = uuid::Uuid::new_v4();
         let chain = inner.chain().clone();
diff --git a/clash_lib/src/app/dns/config.rs b/clash_lib/src/app/dns/config.rs
index 2e3cb3d16..5f8deca80 100644
--- a/clash_lib/src/app/dns/config.rs
+++ b/clash_lib/src/app/dns/config.rs
@@ -150,7 +150,7 @@ impl Config {
         let mut policy = HashMap::new();
 
         for (domain, server) in policy_map {
-            let nameservers = Config::parse_nameserver(&vec![server.to_owned()])?;
+            let nameservers = Config::parse_nameserver(&[server.to_owned()])?;
 
             let (_, valid) = trie::valid_and_split_domain(domain);
             if !valid {
diff --git a/clash_lib/src/app/outbound/manager.rs b/clash_lib/src/app/outbound/manager.rs
index cb6d04752..05a2ccfeb 100644
--- a/clash_lib/src/app/outbound/manager.rs
+++ b/clash_lib/src/app/outbound/manager.rs
@@ -54,8 +54,8 @@ pub type ThreadSafeOutboundManager = Arc<OutboundManager>;
 
 impl OutboundManager {
     pub async fn new(
-        outbounds: Vec<Box<OutboundProxyProtocol>>,
-        outbound_groups: Vec<Box<OutboundGroupProtocol>>,
+        outbounds: Vec<OutboundProxyProtocol>,
+        outbound_groups: Vec<OutboundGroupProtocol>,
         proxy_providers: HashMap<String, OutboundProxyProviderDef>,
         proxy_names: Vec<String>,
         dns_resolver: ThreadSafeDNSResolver,
@@ -174,8 +174,8 @@ impl OutboundManager {
 
     #[allow(clippy::too_many_arguments)]
     async fn load_handlers(
-        outbounds: Vec<Box<OutboundProxyProtocol>>,
-        outbound_groups: Vec<Box<OutboundGroupProtocol>>,
+        outbounds: Vec<OutboundProxyProtocol>,
+        outbound_groups: Vec<OutboundGroupProtocol>,
         proxy_names: Vec<String>,
         proxy_manager: ProxyManager,
         provider_registry: &mut HashMap<String, ThreadSafeProxyProvider>,
@@ -186,7 +186,7 @@ impl OutboundManager {
         let mut proxy_providers = vec![];
 
         for outbound in outbounds.iter() {
-            match outbound.as_ref() {
+            match outbound {
                 OutboundProxyProtocol::Direct => {
                     handlers.insert(PROXY_DIRECT.to_string(), direct::Handler::new());
                 }
@@ -269,7 +269,7 @@ impl OutboundManager {
         }
 
         for outbound_group in outbound_groups.iter() {
-            match outbound_group.as_ref() {
+            match outbound_group {
                 OutboundGroupProtocol::Relay(proto) => {
                     if proto.proxies.as_ref().map(|x| x.len()).unwrap_or_default()
                         + proto
diff --git a/clash_lib/src/app/outbound/utils.rs b/clash_lib/src/app/outbound/utils.rs
index f9e87349b..ef94e5df2 100644
--- a/clash_lib/src/app/outbound/utils.rs
+++ b/clash_lib/src/app/outbound/utils.rs
@@ -6,12 +6,12 @@ use std::{
 use crate::{config::internal::proxy::OutboundGroupProtocol, Error};
 
 // copy paste from https://github.com/Dreamacro/clash/blob/6a661bff0c185f38c4bd9d21c91a3233ba5fdb97/config/utils.go#L21
-pub fn proxy_groups_dag_sort(groups: &mut Vec<Box<OutboundGroupProtocol>>) -> Result<(), Error> {
+pub fn proxy_groups_dag_sort(groups: &mut Vec<OutboundGroupProtocol>) -> Result<(), Error> {
     struct Node {
         in_degree: i32,
 
         // could be either group/proxy
-        proto: Option<Box<OutboundGroupProtocol>>,
+        proto: Option<OutboundGroupProtocol>,
 
         outdegree: i32,
 
@@ -222,7 +222,6 @@ mod tests {
             OutboundGroupProtocol::Select(g5),
         ]
         .into_iter()
-        .map(|x| Box::new(x) as Box<OutboundGroupProtocol>)
         .collect();
 
         super::proxy_groups_dag_sort(&mut groups).unwrap();
@@ -266,7 +265,6 @@ mod tests {
             OutboundGroupProtocol::Fallback(g3),
         ]
         .into_iter()
-        .map(|x| Box::new(x) as Box<OutboundGroupProtocol>)
         .collect();
 
         let e = super::proxy_groups_dag_sort(&mut groups).unwrap_err();
diff --git a/clash_lib/src/config/internal/config.rs b/clash_lib/src/config/internal/config.rs
index 6f24f01ae..3b5e2393b 100644
--- a/clash_lib/src/config/internal/config.rs
+++ b/clash_lib/src/config/internal/config.rs
@@ -138,16 +138,15 @@ impl TryFrom<def::Config> for Config {
                 HashMap::from([
                     (
                         String::from(PROXY_DIRECT),
-                        OutboundProxy::ProxyServer(Box::new(OutboundProxyProtocol::Direct)),
+                        OutboundProxy::ProxyServer(OutboundProxyProtocol::Direct),
                     ),
                     (
                         String::from(PROXY_REJECT),
-                        OutboundProxy::ProxyServer(Box::new(OutboundProxyProtocol::Reject)),
+                        OutboundProxy::ProxyServer(OutboundProxyProtocol::Reject),
                     ),
                 ]),
                 |mut rv, x| {
-                    let proxy =
-                        OutboundProxy::ProxyServer(Box::new(OutboundProxyProtocol::try_from(x)?));
+                    let proxy = OutboundProxy::ProxyServer(OutboundProxyProtocol::try_from(x)?);
                     let name = proxy.name();
                     if rv.contains_key(name.as_str()) {
                         return Err(Error::InvalidConfig(format!(
@@ -163,8 +162,8 @@ impl TryFrom<def::Config> for Config {
             proxy_groups: c.proxy_group.into_iter().try_fold(
                 HashMap::<String, OutboundProxy>::new(),
                 |mut rv, mapping| {
-                    let group = OutboundProxy::ProxyGroup(Box::new(
-                        mapping.clone().try_into().map_err(|x: Error| {
+                    let group = OutboundProxy::ProxyGroup(mapping.clone().try_into().map_err(
+                        |x: Error| {
                             if let Some(name) = mapping.get("name") {
                                 Error::InvalidConfig(format!(
                                     "proxy group: {}: {}",
@@ -174,8 +173,8 @@ impl TryFrom<def::Config> for Config {
                             } else {
                                 Error::InvalidConfig("proxy group name missing".to_string())
                             }
-                        })?,
-                    ));
+                        },
+                    )?);
                     proxy_names.push(group.name());
                     rv.insert(group.name().to_string(), group);
                     Ok::<HashMap<String, OutboundProxy>, Error>(rv)
diff --git a/clash_lib/src/config/internal/proxy.rs b/clash_lib/src/config/internal/proxy.rs
index e12ae16bb..e934a06a0 100644
--- a/clash_lib/src/config/internal/proxy.rs
+++ b/clash_lib/src/config/internal/proxy.rs
@@ -11,9 +11,10 @@ pub const PROXY_DIRECT: &str = "DIRECT";
 pub const PROXY_REJECT: &str = "REJECT";
 pub const PROXY_GLOBAL: &str = "GLOBAL";
 
+#[allow(clippy::large_enum_variant)]
 pub enum OutboundProxy {
-    ProxyServer(Box<OutboundProxyProtocol>),
-    ProxyGroup(Box<OutboundGroupProtocol>),
+    ProxyServer(OutboundProxyProtocol),
+    ProxyGroup(OutboundGroupProtocol),
 }
 
 impl OutboundProxy {
diff --git a/clash_lib/src/proxy/datagram.rs b/clash_lib/src/proxy/datagram.rs
index 50f714fcd..15f026124 100644
--- a/clash_lib/src/proxy/datagram.rs
+++ b/clash_lib/src/proxy/datagram.rs
@@ -142,6 +142,7 @@ pub struct OutboundDatagramImpl {
 }
 
 impl OutboundDatagramImpl {
+    #[allow(clippy::new_ret_no_self)]
     pub fn new(udp: UdpSocket, resolver: ThreadSafeDNSResolver) -> AnyOutboundDatagram {
         let s = Self {
             inner: udp,
diff --git a/clash_lib/src/proxy/shadowsocks/mod.rs b/clash_lib/src/proxy/shadowsocks/mod.rs
index 49a95c433..f3e42e743 100644
--- a/clash_lib/src/proxy/shadowsocks/mod.rs
+++ b/clash_lib/src/proxy/shadowsocks/mod.rs
@@ -150,6 +150,7 @@ pub struct Handler {
 }
 
 impl Handler {
+    #[allow(clippy::new_ret_no_self)]
     pub fn new(opts: HandlerOptions) -> AnyOutboundHandler {
         Arc::new(Self { opts })
     }