4 files changed, 7 insertions, 4 deletions
diff --git a/ecs/src/component/storage.rs b/ecs/src/component/storage.rs
index 54fa834..dcf0181 100644
--- a/ecs/src/component/storage.rs
+++ b/ecs/src/component/storage.rs
@@ -1,10 +1,11 @@
 use std::any::type_name;
 use std::borrow::Borrow;
 use std::cell::RefCell;
-use std::collections::{HashMap, HashSet};
 use std::slice::Iter as SliceIter;
 use std::vec::IntoIter as OwnedVecIter;
 
+use hashbrown::{HashMap, HashSet};
+
 use crate::archetype::Id as ArchetypeId;
 use crate::component::{
     Component,
diff --git a/ecs/src/lib.rs b/ecs/src/lib.rs
index 3926344..43a00f1 100644
--- a/ecs/src/lib.rs
+++ b/ecs/src/lib.rs
@@ -2,12 +2,13 @@
 
 use std::any::{type_name, TypeId};
 use std::cell::RefCell;
-use std::collections::HashMap;
 use std::fmt::Debug;
 use std::mem::ManuallyDrop;
 use std::sync::atomic::{AtomicBool, Ordering};
 use std::sync::Arc;
 
+use hashbrown::HashMap;
+
 use crate::actions::Action;
 use crate::component::storage::Storage as ComponentStorage;
 use crate::component::{
diff --git a/ecs/src/query/options.rs b/ecs/src/query/options.rs
index ead0ac7..772d091 100644
--- a/ecs/src/query/options.rs
+++ b/ecs/src/query/options.rs
@@ -1,6 +1,7 @@
-use std::collections::HashSet;
 use std::marker::PhantomData;
 
+use hashbrown::HashSet;
+
 use crate::component::Component;
 use crate::EntityComponent;
 
diff --git a/ecs/src/system/stateful.rs b/ecs/src/system/stateful.rs
index 5eae1da..80ac346 100644
--- a/ecs/src/system/stateful.rs
+++ b/ecs/src/system/stateful.rs
@@ -1,7 +1,7 @@
 use std::any::{Any, TypeId};
-use std::collections::HashMap;
 use std::panic::{RefUnwindSafe, UnwindSafe};
 
+use hashbrown::HashMap;
 use seq_macro::seq;
 
 use crate::component::Component;