diff --git a/.github/workflows/tquic-benchmark.yml b/.github/workflows/tquic-benchmark.yml
index 6893acda..55dc22fb 100644
--- a/.github/workflows/tquic-benchmark.yml
+++ b/.github/workflows/tquic-benchmark.yml
@@ -11,7 +11,7 @@ env:
 jobs:
   config:
     name: Prepare config
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     outputs:
       benchmark_date: ${{ steps.set-benchmark-date.outputs.benchmark_date }}
       benchmark_impls: ${{ steps.set-implements.outputs.benchmark_impls }}
@@ -43,7 +43,7 @@ jobs:
 
   build_tquic:
     name: Build tquic
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     needs: config
     steps:
     - uses: actions/checkout@v4
@@ -75,7 +75,7 @@ jobs:
 
   build_lsquic:
     name: Build lsquic
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     needs: config
     steps:
     - uses: actions/checkout@v4
@@ -109,7 +109,7 @@ jobs:
 
   gen_cert:
     name: Generate cert
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     needs: config
     steps:
     - name: Generate cert
@@ -124,7 +124,7 @@ jobs:
 
   gen_files:
     name: Generate files
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     needs: config
     steps:
     - name: Generate files
@@ -142,7 +142,7 @@ jobs:
   run_long_conn:
     name: Run long connection scenario benchmark
     needs: [ config, build_tquic, build_lsquic, gen_cert, gen_files ]
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     strategy:
       matrix:
         file: [ 15K, 50K, 2M ]
@@ -177,7 +177,7 @@ jobs:
   run_short_conn:
     name: Run short connection scenario benchmark
     needs: [ config, build_tquic, build_lsquic, gen_cert, gen_files ]
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     steps:
     - name: Download all
       uses: actions/download-artifact@v4
@@ -191,7 +191,7 @@ jobs:
             sh ${impl}_server_bin/start_${impl}.sh
             pgrep ${impl}_server
             sleep 1
-            ./tquic_client_bin/tquic_client https://tquic_benchmark:4433/file_1K --connect-to 127.0.0.1:4433 --threads 10 --max-concurrent-conns 1 --max-concurrent-requests 1 --max-requests-per-conn 1 --total-requests-per-thread 0 -d ${{ needs.config.outputs.benchmark_duration }} --disable-stateless-reset --send-batch-size 1 --recv-udp-payload-size 1350 --send-udp-payload-size 1350 --log-level OFF > client.log 2>&1
+            ./tquic_client_bin/tquic_client https://tquic_benchmark:4433/file_1K --connect-to 127.0.0.1:4433 --threads 10 --max-concurrent-conns 10 --max-concurrent-requests 1 --max-requests-per-conn 1 --total-requests-per-thread 0 -d ${{ needs.config.outputs.benchmark_duration }} --disable-stateless-reset --send-batch-size 1 --recv-udp-payload-size 1350 --send-udp-payload-size 1350 --log-level OFF > client.log 2>&1
             cat client.log | grep "finished in" | awk '{print $4}' > benchmark_short_${impl}_1K_10_1.${round}.${{ needs.config.outputs.benchmark_date }}
             killall ${impl}_server
             sleep 1
@@ -205,7 +205,7 @@ jobs:
         retention-days: 90
 
   result:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     needs: [ run_long_conn, run_short_conn ]
     steps:
     - name: Download plot tools
diff --git a/src/congestion_control/bbr.rs b/src/congestion_control/bbr.rs
index 0dcb4bf7..ea8262c8 100644
--- a/src/congestion_control/bbr.rs
+++ b/src/congestion_control/bbr.rs
@@ -1064,7 +1064,7 @@ impl CongestionController for Bbr {
     }
 
     fn in_recovery(&self, sent_time: Instant) -> bool {
-        self.recovery_epoch_start.map_or(false, |t| sent_time <= t)
+        self.recovery_epoch_start.is_some_and(|t| sent_time <= t)
     }
 
     fn in_slow_start(&self) -> bool {
diff --git a/src/congestion_control/bbr3.rs b/src/congestion_control/bbr3.rs
index 53830c90..e9e66c30 100644
--- a/src/congestion_control/bbr3.rs
+++ b/src/congestion_control/bbr3.rs
@@ -760,7 +760,7 @@ impl Bbr3 {
     }
 
     fn in_recovery(&self, sent_time: Instant) -> bool {
-        self.recovery_epoch_start.map_or(false, |t| sent_time <= t)
+        self.recovery_epoch_start.is_some_and(|t| sent_time <= t)
     }
 
     fn in_slow_start(&self) -> bool {
diff --git a/src/congestion_control/cubic.rs b/src/congestion_control/cubic.rs
index f65225e8..4e5622f2 100644
--- a/src/congestion_control/cubic.rs
+++ b/src/congestion_control/cubic.rs
@@ -506,7 +506,7 @@ impl CongestionController for Cubic {
     }
 
     fn in_recovery(&self, sent_time: Instant) -> bool {
-        self.recovery_epoch_start.map_or(false, |t| sent_time <= t)
+        self.recovery_epoch_start.is_some_and(|t| sent_time <= t)
     }
 
     fn congestion_window(&self) -> u64 {
diff --git a/src/connection/connection.rs b/src/connection/connection.rs
index cff570e7..e00adb5c 100644
--- a/src/connection/connection.rs
+++ b/src/connection/connection.rs
@@ -2996,7 +2996,7 @@ impl Connection {
         // frame in a packet with the highest level of packet protection to
         // avoid the packet being discarded.
         // See RFC 9000 Section 10.2.3
-        if self.local_error.as_ref().map_or(false, |e| !e.is_app) {
+        if self.local_error.as_ref().is_some_and(|e| !e.is_app) {
             let pkt_type = match self.tls_session.write_level() {
                 Level::Initial => PacketType::Initial,
                 Level::Handshake => PacketType::Handshake,
@@ -3073,7 +3073,7 @@ impl Connection {
             || self.tls_session.is_in_early_data())
             && (self.need_send_handshake_done_frame()
                 || self.need_send_new_token_frame()
-                || self.local_error.as_ref().map_or(false, |e| e.is_app)
+                || self.local_error.as_ref().is_some_and(|e| e.is_app)
                 || path.need_send_validation_frames(self.is_server)
                 || path.dplpmtud.should_probe()
                 || path.need_send_ping
@@ -3094,7 +3094,7 @@ impl Connection {
     fn need_send_path_unaware_frames(&self) -> bool {
         self.need_send_handshake_done_frame()
             || self.need_send_new_token_frame()
-            || self.local_error.as_ref().map_or(false, |e| e.is_app)
+            || self.local_error.as_ref().is_some_and(|e| e.is_app)
             || self.cids.need_send_cid_control_frames()
             || self.streams.need_send_stream_frames()
     }
diff --git a/src/connection/recovery.rs b/src/connection/recovery.rs
index 3d5699cd..21b008ea 100644
--- a/src/connection/recovery.rs
+++ b/src/connection/recovery.rs
@@ -802,7 +802,7 @@ impl Recovery {
         space.lost.clear();
         space.acked.clear();
 
-        // Reset loss dection timer
+        // Reset loss detection timer
         space.time_of_last_sent_ack_eliciting_pkt = None;
         space.loss_time = None;
         space.loss_probes = 0;
diff --git a/src/connection/stream.rs b/src/connection/stream.rs
index 0043d22e..b16aa5da 100644
--- a/src/connection/stream.rs
+++ b/src/connection/stream.rs
@@ -4731,7 +4731,7 @@ mod tests {
         // write empty data with fin flag, it should be ok.
         assert_eq!(stream.send.write(Bytes::new(), true), Ok(0));
 
-        // Shutdown the stream abrubtly, it should be ok.
+        // Shutdown the stream abruptly, it should be ok.
         assert_eq!(stream.send.shutdown(), Ok((0, 18)));
         // Here we call `write` to make sure the stream's fin_off is set.
         assert_eq!(stream.recv.write(0, Bytes::new(), true), Ok(()));
@@ -4939,7 +4939,7 @@ mod tests {
         assert_eq!(map.get(20).unwrap().recv.fin_off, Some(30));
 
         // 10. Receive a RESET_STREAM frame for a stream which has been closed.
-        // Shutdown the stream abrubtly, it should be ok.
+        // Shutdown the stream abruptly, it should be ok.
         let stream = map.get_or_create(24, false).unwrap();
         assert_eq!(stream.send.shutdown(), Ok((0, 0)));
         // Here we call `write` to make sure the stream's fin_off is set.
@@ -5064,7 +5064,7 @@ mod tests {
         assert_eq!(map.on_stop_sending_frame_received(4, 0), Ok(()));
 
         // 5. Receive a STOP_SENDING frame for a stream which has been closed.
-        // Shutdown the stream abrubtly, it should be ok.
+        // Shutdown the stream abruptly, it should be ok.
         let stream = map.get_or_create(24, false).unwrap();
         assert_eq!(stream.send.shutdown(), Ok((0, 0)));
         // Here we call `write` to make sure the stream's fin_off is set.
@@ -5134,7 +5134,7 @@ mod tests {
         assert_eq!(map.on_stop_sending_frame_received(5, 0), Ok(()));
 
         // 5. Receive a STOP_SENDING frame for a stream which has been closed.
-        // Shutdown the stream abrubtly, it should be ok.
+        // Shutdown the stream abruptly, it should be ok.
         let stream = map.get_or_create(25, false).unwrap();
         assert_eq!(stream.send.shutdown(), Ok((0, 0)));
         // Here we call `write` to make sure the stream's fin_off is set.
diff --git a/src/connection/timer.rs b/src/connection/timer.rs
index 8334bbac..8169e1ff 100644
--- a/src/connection/timer.rs
+++ b/src/connection/timer.rs
@@ -77,7 +77,7 @@ impl TimerTable {
 
     /// Check whether the given timer is expired
     pub fn is_expired(&self, timer: Timer, after: Instant) -> bool {
-        self.expires[timer as usize].map_or(false, |x| x <= after)
+        self.expires[timer as usize].is_some_and(|x| x <= after)
     }
 }
 
diff --git a/src/endpoint.rs b/src/endpoint.rs
index 1dc5035e..3d0919e6 100644
--- a/src/endpoint.rs
+++ b/src/endpoint.rs
@@ -757,10 +757,7 @@ impl Endpoint {
                 &self.trace_id,
             );
 
-            let done = match self.sender.on_packets_send(batch) {
-                Ok(v) => v,
-                Err(e) => return Err(e),
-            };
+            let done = self.sender.on_packets_send(batch)?;
             if done == 0 {
                 break;
             }
diff --git a/src/ffi.rs b/src/ffi.rs
index d9665a39..b1fb02e2 100644
--- a/src/ffi.rs
+++ b/src/ffi.rs
@@ -1992,7 +1992,7 @@ pub struct PacketInfo<'a> {
     dst_len: socklen_t,
 }
 
-impl<'a> From<&PacketInfo<'a>> for crate::PacketInfo {
+impl From<&PacketInfo<'_>> for crate::PacketInfo {
     fn from(info: &PacketInfo) -> crate::PacketInfo {
         crate::PacketInfo {
             src: sock_addr_from_c(info.src, info.src_len),
diff --git a/src/h3/h3.rs b/src/h3/h3.rs
index f977cd89..7313e57b 100644
--- a/src/h3/h3.rs
+++ b/src/h3/h3.rs
@@ -175,7 +175,7 @@ impl<'a> HeaderRef<'a> {
     }
 }
 
-impl<'a> NameValue for HeaderRef<'a> {
+impl NameValue for HeaderRef<'_> {
     fn name(&self) -> &[u8] {
         self.0
     }
diff --git a/src/h3/qpack/huffman.rs b/src/h3/qpack/huffman.rs
index 5e27e6fd..9439b1da 100644
--- a/src/h3/qpack/huffman.rs
+++ b/src/h3/qpack/huffman.rs
@@ -419,7 +419,7 @@ const ENCODE_TABLE: [(usize, u64); 257] = [
 ];
 
 /// The multi-level decoding table for huffman decoder.
-const DECODE_TABLE: [[(usize, u8, u8); 16]; 256] = [
+static DECODE_TABLE: [[(usize, u8, u8); 16]; 256] = [
     // 0
     [
         // (next-state, byte, flags).
diff --git a/src/packet.rs b/src/packet.rs
index bb09395d..1a5498e6 100644
--- a/src/packet.rs
+++ b/src/packet.rs
@@ -494,7 +494,7 @@ fn encrypt_header(
 /// Decrypt payload of a QUIC packet.
 ///
 /// The `pkt_buf` is the raw data of a QUIC packet.
-/// The `paylaod_offset` is the offset of packet payload in `pkt_buf`.
+/// The `payload_offset` is the offset of packet payload in `pkt_buf`.
 /// The `payload_len` is the length of pacekt payload (other than the value of Length field).
 /// The `pkt_num` is the decrypted and decoded packet number.
 #[allow(unexpected_cfgs)]
diff --git a/src/ranges.rs b/src/ranges.rs
index b03a6de2..4f1ebfc9 100644
--- a/src/ranges.rs
+++ b/src/ranges.rs
@@ -307,7 +307,7 @@ pub struct Iter<'a> {
     set: btree_map::Iter<'a, u64, u64>,
 }
 
-impl<'a> Iterator for Iter<'a> {
+impl Iterator for Iter<'_> {
     type Item = Range<u64>;
 
     fn next(&mut self) -> Option<Range<u64>> {
@@ -316,14 +316,14 @@ impl<'a> Iterator for Iter<'a> {
     }
 }
 
-impl<'a> DoubleEndedIterator for Iter<'a> {
+impl DoubleEndedIterator for Iter<'_> {
     fn next_back(&mut self) -> Option<Range<u64>> {
         let (&start, &end) = self.set.next_back()?;
         Some(start..end)
     }
 }
 
-impl<'a> ExactSizeIterator for Iter<'a> {
+impl ExactSizeIterator for Iter<'_> {
     fn len(&self) -> usize {
         self.set.len()
     }
@@ -335,7 +335,7 @@ pub struct Flatten<'a> {
     end: u64,
 }
 
-impl<'a> Iterator for Flatten<'a> {
+impl Iterator for Flatten<'_> {
     type Item = u64;
 
     fn next(&mut self) -> Option<u64> {
@@ -353,7 +353,7 @@ impl<'a> Iterator for Flatten<'a> {
     }
 }
 
-impl<'a> DoubleEndedIterator for Flatten<'a> {
+impl DoubleEndedIterator for Flatten<'_> {
     fn next_back(&mut self) -> Option<u64> {
         if self.next == self.end {
             let (&start, &end) = self.set.next_back()?;