diff --git a/Cargo.lock b/Cargo.lock
index 0195105c..fc113cc3 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -34,6 +34,12 @@ dependencies = [
  "version_check",
 ]
 
+[[package]]
+name = "allocator-api2"
+version = "0.2.16"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0942ffc6dcaadf03badf6e6a2d0228460359d5e34b57ccdc720b7382dfbd5ec5"
+
 [[package]]
 name = "atomic_float"
 version = "0.1.0"
@@ -92,6 +98,7 @@ dependencies = [
  "float-ord",
  "flume",
  "fxhash",
+ "hashbrown 0.14.0",
  "indexmap 2.0.0",
  "itertools",
  "lazy_static",
@@ -412,6 +419,10 @@ name = "hashbrown"
 version = "0.14.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2c6201b9ff9fd90a5a3bac2e56a830d0caa509576f0e503818ee82c181b3437a"
+dependencies = [
+ "ahash 0.8.3",
+ "allocator-api2",
+]
 
 [[package]]
 name = "hermit-abi"
diff --git a/Cargo.toml b/Cargo.toml
index 455ccd26..1a2d7a8a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -12,7 +12,7 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [features]
-default = ["auxcleanup_gas_deletion", "turf_processing", "katmos"]
+default = ["auxcleanup_gas_deletion", "turf_processing"]
 auxcleanup_gas_deletion = ["auxcleanup"]
 zas_hooks = []
 turf_processing = []
@@ -44,6 +44,7 @@ ahash = "0.8.3"
 lazy_static = "1.4.0"
 indexmap = { version = "2.0.0", features = ["rayon"] }
 dashmap = { version = "5.5.0", features = ["rayon"] }
+hashbrown = "0.14.0"
 atomic_float = "0.1.0"
 petgraph = "0.6.3"
 bitflags = "2.3.3"
diff --git a/src/gas/types.rs b/src/gas/types.rs
index 09f2f9d8..45255893 100644
--- a/src/gas/types.rs
+++ b/src/gas/types.rs
@@ -13,10 +13,12 @@ use dashmap::DashMap;
 
 use std::{
 	cell::RefCell,
-	collections::{BTreeMap, HashMap},
+	collections::BTreeMap,
 	sync::atomic::{AtomicUsize, Ordering},
 };
 
+use hashbrown::HashMap;
+
 static TOTAL_NUM_GASES: AtomicUsize = AtomicUsize::new(0);
 
 static REACTION_INFO: RwLock<Option<BTreeMap<ReactionPriority, Reaction>>> = const_rwlock(None);
diff --git a/src/reaction.rs b/src/reaction.rs
index f6b8860d..9efa9257 100644
--- a/src/reaction.rs
+++ b/src/reaction.rs
@@ -25,7 +25,7 @@ pub struct Reaction {
 }
 
 use fxhash::FxBuildHasher;
-use std::collections::HashMap;
+use hashbrown::HashMap;
 
 enum ReactionSide {
 	ByondSide(Value),
diff --git a/src/reaction/hooks.rs b/src/reaction/hooks.rs
index a9be24eb..05185e56 100644
--- a/src/reaction/hooks.rs
+++ b/src/reaction/hooks.rs
@@ -338,7 +338,7 @@ fn fusion(byond_air: &Value, holder: &Value) -> DMResult<Value> {
 #[cfg(feature = "generic_fire_hook")]
 fn generic_fire(byond_air: &Value, holder: &Value) -> DMResult<Value> {
 	use fxhash::FxBuildHasher;
-	use std::collections::HashMap;
+	use hashbrown::HashMap;
 	let mut burn_results: HashMap<GasIDX, f32, FxBuildHasher> = HashMap::with_capacity_and_hasher(
 		super::total_num_gases() as usize,
 		FxBuildHasher::default(),
diff --git a/src/turfs/katmos.rs b/src/turfs/katmos.rs
index 0195651f..8fc2c3d7 100644
--- a/src/turfs/katmos.rs
+++ b/src/turfs/katmos.rs
@@ -15,11 +15,13 @@ use coarsetime::{Duration, Instant};
 use std::{
 	cell::Cell,
 	{
-		collections::{BTreeSet, HashMap, HashSet},
+		collections::BTreeSet,
 		sync::atomic::{AtomicUsize, Ordering},
 	},
 };
 
+use hashbrown::{HashMap, HashSet};
+
 use parking_lot::{const_mutex, Mutex};
 
 static EQUALIZE_CHANNEL: Mutex<Option<BTreeSet<TurfID>>> = const_mutex(None);