perf(ecs): use hashbrown's HashMap & HashSet

Hashbrown's HashMap & HashSet is faster than std's. I
guess this is because std (which uses hashbrown) does
not enable hashbrown's default-hasher flag and instead
uses a slower hasher.

1 files changed, 1 insertions, 1 deletions

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;