diff --git a/Cargo.toml b/Cargo.toml
index 99aeca6154..b5fcbfced9 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -44,6 +44,8 @@ opt-level = 2
 opt-level = 3
 [profile.dev.package."veloren-common"]
 opt-level = 2
+[profile.dev.package."veloren-common-systems"]
+incremental = false
 [profile.dev.package."veloren-client"]
 opt-level = 2
 [profile.dev.package."veloren-server"]
diff --git a/common/systems/src/character_behavior.rs b/common/systems/src/character_behavior.rs
index 20590f825f..e7db1e0b36 100644
--- a/common/systems/src/character_behavior.rs
+++ b/common/systems/src/character_behavior.rs
@@ -257,7 +257,7 @@ impl<'a> System<'a> for Sys {
             }
 
             // Controller actions
-            let actions = std::mem::replace(&mut controller.actions, Vec::new());
+            let actions = std::mem::take(&mut controller.actions);
 
             let mut join_struct = JoinStruct {
                 entity,
diff --git a/plugin/rt/src/lib.rs b/plugin/rt/src/lib.rs
index 82ef453eb4..30d37635e3 100644
--- a/plugin/rt/src/lib.rs
+++ b/plugin/rt/src/lib.rs
@@ -1,5 +1,3 @@
-#![feature(const_fn)]
-
 pub extern crate plugin_derive;
 
 pub mod retrieve;
diff --git a/server/src/events/inventory_manip.rs b/server/src/events/inventory_manip.rs
index 556d40f966..2e91ab1aaa 100644
--- a/server/src/events/inventory_manip.rs
+++ b/server/src/events/inventory_manip.rs
@@ -781,10 +781,9 @@ mod tests {
         let position = Pos(Vec3::zero());
         let item_position = Pos(Vec3::one());
 
-        assert_eq!(
-            within_pickup_range(test_cylinder(position), || test_cylinder(item_position),),
-            true
-        );
+        assert!(within_pickup_range(test_cylinder(position), || {
+            test_cylinder(item_position)
+        },),);
     }
 
     #[test]
@@ -792,9 +791,8 @@ mod tests {
         let position = Pos(Vec3::zero());
         let item_position = Pos(Vec3::one() * 500.0);
 
-        assert_eq!(
-            within_pickup_range(test_cylinder(position), || test_cylinder(item_position),),
-            false
-        );
+        assert!(!within_pickup_range(test_cylinder(position), || {
+            test_cylinder(item_position)
+        },),);
     }
 }
diff --git a/server/src/sys/agent.rs b/server/src/sys/agent.rs
index fa01525b93..7ac35e0642 100644
--- a/server/src/sys/agent.rs
+++ b/server/src/sys/agent.rs
@@ -1,3 +1,5 @@
+#![allow(clippy::branches_sharing_code)] // TODO: evaluate
+
 use crate::rtsim::{Entity as RtSimData, RtSim};
 use common::{
     comp::{
diff --git a/voxygen/src/audio/sfx/event_mapper/movement/tests.rs b/voxygen/src/audio/sfx/event_mapper/movement/tests.rs
index 8e9523edfa..919c5187ea 100644
--- a/voxygen/src/audio/sfx/event_mapper/movement/tests.rs
+++ b/voxygen/src/audio/sfx/event_mapper/movement/tests.rs
@@ -15,7 +15,7 @@ fn no_item_config_no_emit() {
     let previous_state = PreviousEntityState::default();
     let result = MovementEventMapper::should_emit(&previous_state, None);
 
-    assert_eq!(result, false);
+    assert!(!result);
 }
 
 #[test]
@@ -39,7 +39,7 @@ fn config_but_played_since_threshold_no_emit() {
         Some((&SfxEvent::Run(BlockKind::Grass), &trigger_item)),
     );
 
-    assert_eq!(result, false);
+    assert!(!result);
 }
 
 #[test]
@@ -62,7 +62,7 @@ fn config_and_not_played_since_threshold_emits() {
         Some((&SfxEvent::Run(BlockKind::Grass), &trigger_item)),
     );
 
-    assert_eq!(result, true);
+    assert!(result);
 }
 
 #[test]
@@ -87,7 +87,7 @@ fn same_previous_event_elapsed_emits() {
         Some((&SfxEvent::Run(BlockKind::Grass), &trigger_item)),
     );
 
-    assert_eq!(result, true);
+    assert!(result);
 }
 
 #[test]
diff --git a/voxygen/src/hud/mod.rs b/voxygen/src/hud/mod.rs
index bc8b194fc0..bbc95ff3e9 100644
--- a/voxygen/src/hud/mod.rs
+++ b/voxygen/src/hud/mod.rs
@@ -956,7 +956,7 @@ impl Hud {
         interactable: Option<Interactable>,
     ) -> Vec<Event> {
         span!(_guard, "update_layout", "Hud::update_layout");
-        let mut events = std::mem::replace(&mut self.events, Vec::new());
+        let mut events = core::mem::take(&mut self.events);
         let (ref mut ui_widgets, ref mut item_tooltip_manager, ref mut tooltip_manager) =
             &mut self.ui.set_widgets();
         // self.ui.set_item_widgets(); pulse time for pulsating elements
diff --git a/voxygen/src/mesh/terrain.rs b/voxygen/src/mesh/terrain.rs
index 7904be3a6e..682e798dd6 100644
--- a/voxygen/src/mesh/terrain.rs
+++ b/voxygen/src/mesh/terrain.rs
@@ -1,3 +1,5 @@
+#![allow(clippy::clone_on_copy)] // TODO: fix after wgpu branch 
+
 use crate::{
     mesh::{
         greedy::{self, GreedyConfig, GreedyMesh},
diff --git a/voxygen/src/ui/ice/renderer/widget/slider.rs b/voxygen/src/ui/ice/renderer/widget/slider.rs
index ec624105bf..7441254555 100644
--- a/voxygen/src/ui/ice/renderer/widget/slider.rs
+++ b/voxygen/src/ui/ice/renderer/widget/slider.rs
@@ -79,6 +79,7 @@ impl slider::Renderer for IcedRenderer {
             mouse::Interaction::Idle
         };
 
+        #[allow(clippy::branches_sharing_code)] // TODO: remove
         #[allow(clippy::if_same_then_else)] // TODO: remove
         let primitives = if style.labels {
             // TODO text label on left and right ends
diff --git a/voxygen/src/ui/mod.rs b/voxygen/src/ui/mod.rs
index 6999d081d4..64ad6ec49d 100644
--- a/voxygen/src/ui/mod.rs
+++ b/voxygen/src/ui/mod.rs
@@ -530,6 +530,7 @@ impl Ui {
             });
 
         if glyph_missing {
+            #[allow(clippy::branches_sharing_code)] // TODO: evaluate (ask sharp)
             if *retry {
                 // If a glyph was missing and this was our second try, we know something was
                 // messed up during the glyph_cache redraw.  It is possible that
diff --git a/voxygen/src/ui/widgets/slot.rs b/voxygen/src/ui/widgets/slot.rs
index 055655a3ac..e1a6272b4a 100644
--- a/voxygen/src/ui/widgets/slot.rs
+++ b/voxygen/src/ui/widgets/slot.rs
@@ -194,8 +194,8 @@ where
 
     pub fn maintain(&mut self, ui: &mut conrod_core::UiCell) -> Vec<Event<S>> {
         // Clear
-        let slot_ids = std::mem::replace(&mut self.slot_ids, Vec::new());
-        let slots = std::mem::replace(&mut self.slots, Vec::new());
+        let slot_ids = core::mem::take(&mut self.slot_ids);
+        let slots = core::mem::take(&mut self.slots);
 
         // Detect drops by of selected item by clicking in empty space
         if let ManagerState::Selected(_, slot) = self.state {
@@ -295,7 +295,7 @@ where
             // }
         }
 
-        std::mem::replace(&mut self.events, Vec::new())
+        core::mem::take(&mut self.events)
     }
 
     fn update(
diff --git a/world/examples/water.rs b/world/examples/water.rs
index 42dd3fad26..0c3da7012b 100644
--- a/world/examples/water.rs
+++ b/world/examples/water.rs
@@ -1,3 +1,4 @@
+#![allow(clippy::branches_sharing_code)] // TODO: evaluate
 use common::{
     terrain::{
         map::{MapConfig, MapDebug, MapSample},
diff --git a/world/src/lib.rs b/world/src/lib.rs
index b8ffc2a71e..83f160b68f 100644
--- a/world/src/lib.rs
+++ b/world/src/lib.rs
@@ -5,6 +5,7 @@
     clippy::blocks_in_if_conditions,
     clippy::too_many_arguments
 )]
+#![allow(clippy::branches_sharing_code)] // TODO: evaluate
 #![deny(clippy::clone_on_ref_ptr)]
 #![feature(
     arbitrary_enum_discriminant,