diff --git a/Cargo.toml b/Cargo.toml
index c809ed8..3e6b93c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -83,7 +83,7 @@ pounder_v1_1 = [ ]
 [profile.dev]
 codegen-units = 1
 incremental = false
-opt-level = 1
+opt-level = 3
 
 [profile.release]
 opt-level = 3
diff --git a/src/bin/dual-iir.rs b/src/bin/dual-iir.rs
index 3045802..b7bf202 100644
--- a/src/bin/dual-iir.rs
+++ b/src/bin/dual-iir.rs
@@ -95,12 +95,7 @@ const APP: () = {
             stabilizer.net.mac_address,
         );
 
-        let generator = {
-            use smoltcp_nal::embedded_nal::{IpAddr, Ipv4Addr, SocketAddr};
-            let remote =
-                SocketAddr::new(IpAddr::V4(Ipv4Addr::unspecified()), 0);
-            network.enable_streaming(remote.into())
-        };
+        let generator = network.enable_streaming(StreamTarget::default().into());
 
         // Spawn a settings update for default settings.
         c.spawn.settings_update().unwrap();
@@ -220,7 +215,7 @@ const APP: () = {
                     c.spawn.settings_update().unwrap()
                 }
                 NetworkState::Updated => {}
-                NetworkState::NoChange => {}
+                NetworkState::NoChange => cortex_m::asm::wfi(),
             }
         }
     }
diff --git a/src/hardware/setup.rs b/src/hardware/setup.rs
index 83f9b87..8436bf0 100644
--- a/src/hardware/setup.rs
+++ b/src/hardware/setup.rs
@@ -258,11 +258,6 @@ pub fn setup(
     let gpiof = device.GPIOF.split(ccdr.peripheral.GPIOF);
     let mut gpiog = device.GPIOG.split(ccdr.peripheral.GPIOG);
 
-    let _uart_tx = gpiod
-        .pd8
-        .into_push_pull_output()
-        .set_speed(hal::gpio::Speed::VeryHigh);
-
     let dma_streams =
         hal::dma::dma::StreamsTuple::new(device.DMA1, ccdr.peripheral.DMA1);