diff --git a/common/src/cmd.rs b/common/src/cmd.rs
index 8ab1e6266b..c77d51f3dc 100644
--- a/common/src/cmd.rs
+++ b/common/src/cmd.rs
@@ -1,7 +1,7 @@
 use crate::{assets, comp, npc, terrain};
+use hashbrown::HashMap;
 use lazy_static::lazy_static;
 use std::{
-    collections::HashMap,
     fmt::{self, Display},
     path::Path,
     str::FromStr,
diff --git a/common/src/comp/buff.rs b/common/src/comp/buff.rs
index ec803fcbde..a5f5f89e2f 100644
--- a/common/src/comp/buff.rs
+++ b/common/src/comp/buff.rs
@@ -1,8 +1,9 @@
 use crate::uid::Uid;
+use hashbrown::HashMap;
 use serde::{Deserialize, Serialize};
 use specs::{Component, FlaggedStorage};
 use specs_idvs::IdvStorage;
-use std::{cmp::Ordering, collections::HashMap, time::Duration};
+use std::{cmp::Ordering, time::Duration};
 
 /// De/buff Kind.
 /// This is used to determine what effects a buff will have
diff --git a/common/src/comp/inventory/item/tool.rs b/common/src/comp/inventory/item/tool.rs
index 497e40f0c9..d1a32225ca 100644
--- a/common/src/comp/inventory/item/tool.rs
+++ b/common/src/comp/inventory/item/tool.rs
@@ -5,8 +5,9 @@ use crate::{
     assets::{self, Asset},
     comp::CharacterAbility,
 };
+use hashbrown::HashMap;
 use serde::{Deserialize, Serialize};
-use std::{collections::HashMap, fs::File, io::BufReader, time::Duration};
+use std::{fs::File, io::BufReader, time::Duration};
 use tracing::error;
 
 #[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, Serialize, Deserialize)]
diff --git a/common/src/comp/skills.rs b/common/src/comp/skills.rs
index 6c552fee60..b31d30dfee 100644
--- a/common/src/comp/skills.rs
+++ b/common/src/comp/skills.rs
@@ -1,9 +1,7 @@
+use hashbrown::{HashMap, HashSet};
 use lazy_static::lazy_static;
 use serde::{Deserialize, Serialize};
-use std::{
-    collections::{HashMap, HashSet},
-    hash::Hash,
-};
+use std::hash::Hash;
 use tracing::warn;
 
 lazy_static! {
diff --git a/common/src/terrain/block.rs b/common/src/terrain/block.rs
index 2a64a17e56..804765da2b 100644
--- a/common/src/terrain/block.rs
+++ b/common/src/terrain/block.rs
@@ -1,11 +1,12 @@
 use super::SpriteKind;
 use crate::make_case_elim;
 use enum_iterator::IntoEnumIterator;
+use hashbrown::HashMap;
 use lazy_static::lazy_static;
 use num_derive::FromPrimitive;
 use num_traits::FromPrimitive;
 use serde::{Deserialize, Serialize};
-use std::{collections::HashMap, convert::TryFrom, fmt, ops::Deref};
+use std::{convert::TryFrom, fmt, ops::Deref};
 use vek::*;
 
 make_case_elim!(
diff --git a/common/src/terrain/sprite.rs b/common/src/terrain/sprite.rs
index c50a9ffc29..2f91924b28 100644
--- a/common/src/terrain/sprite.rs
+++ b/common/src/terrain/sprite.rs
@@ -1,9 +1,10 @@
 use crate::make_case_elim;
 use enum_iterator::IntoEnumIterator;
+use hashbrown::HashMap;
 use lazy_static::lazy_static;
 use num_derive::FromPrimitive;
 use serde::{Deserialize, Serialize};
-use std::{collections::HashMap, convert::TryFrom, fmt};
+use std::{convert::TryFrom, fmt};
 
 make_case_elim!(
     sprite_kind,
diff --git a/common/src/uid.rs b/common/src/uid.rs
index cff2dc9664..22c5eb347f 100644
--- a/common/src/uid.rs
+++ b/common/src/uid.rs
@@ -1,10 +1,11 @@
+use hashbrown::HashMap;
 use serde::{Deserialize, Serialize};
 use specs::{
     saveload::{Marker, MarkerAllocator},
     world::EntitiesRes,
     Component, Entity, FlaggedStorage, Join, ReadStorage, VecStorage,
 };
-use std::{collections::HashMap, fmt, u64};
+use std::{fmt, u64};
 
 #[derive(Copy, Clone, Debug, Eq, Hash, PartialEq, Serialize, Deserialize)]
 pub struct Uid(pub u64);
diff --git a/voxygen/anim/src/dyn_lib.rs b/voxygen/anim/src/dyn_lib.rs
index 7f817f625f..71c12e90aa 100644
--- a/voxygen/anim/src/dyn_lib.rs
+++ b/voxygen/anim/src/dyn_lib.rs
@@ -1,3 +1,4 @@
+use hashbrown::HashSet;
 use lazy_static::lazy_static;
 use libloading::Library;
 use notify::{immediate_watcher, EventKind, RecursiveMode, Watcher};
@@ -147,7 +148,7 @@ pub fn init() {
     // "Debounces" events since I can't find the option to do this in the latest
     // `notify`
     thread::spawn(move || {
-        let mut modified_paths = std::collections::HashSet::new();
+        let mut modified_paths = HashSet::new();
 
         while let Ok(path) = reload_recv.recv() {
             modified_paths.insert(path);
diff --git a/voxygen/src/hud/mod.rs b/voxygen/src/hud/mod.rs
index a860fa05b9..00eae0ab1d 100644
--- a/voxygen/src/hud/mod.rs
+++ b/voxygen/src/hud/mod.rs
@@ -73,9 +73,10 @@ use conrod_core::{
     widget::{self, Button, Image, Text},
     widget_ids, Color, Colorable, Labelable, Positionable, Sizeable, Widget,
 };
+use hashbrown::HashMap;
 use specs::{Join, WorldExt};
 use std::{
-    collections::{HashMap, VecDeque},
+    collections::VecDeque,
     sync::Arc,
     time::{Duration, Instant},
 };
diff --git a/voxygen/src/i18n.rs b/voxygen/src/i18n.rs
index 13e34dc0c0..11eb66cab7 100644
--- a/voxygen/src/i18n.rs
+++ b/voxygen/src/i18n.rs
@@ -1,12 +1,9 @@
 use common::assets::{self, Asset};
 use deunicode::deunicode;
+use hashbrown::{HashMap, HashSet};
 use ron::de::from_reader;
 use serde::{Deserialize, Serialize};
-use std::{
-    collections::{HashMap, HashSet},
-    fs::File,
-    io::BufReader,
-};
+use std::{fs::File, io::BufReader};
 use tracing::warn;
 
 /// The reference language, aka the more up-to-date localization data.
@@ -177,9 +174,9 @@ pub fn i18n_asset_key(language_id: &str) -> String { "voxygen.i18n.".to_string()
 mod tests {
     use super::Localization;
     use git2::Repository;
+    use hashbrown::{HashMap, HashSet};
     use ron::de::{from_bytes, from_reader};
     use std::{
-        collections::{HashMap, HashSet},
         fs,
         path::{Path, PathBuf},
     };
diff --git a/world/src/layer/tree.rs b/world/src/layer/tree.rs
index f7610e342b..7160504c0a 100644
--- a/world/src/layer/tree.rs
+++ b/world/src/layer/tree.rs
@@ -9,8 +9,9 @@ use common::{
     terrain::{structure::Structure, Block, BlockKind},
     vol::ReadVol,
 };
+use hashbrown::HashMap;
 use lazy_static::lazy_static;
-use std::{collections::HashMap, f32, sync::Arc};
+use std::{f32, sync::Arc};
 use vek::*;
 
 lazy_static! {