diff --git a/Cargo.toml b/Cargo.toml
index 557aa2d..f2d6333 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "osm4routing"
 edition = "2021"
-version = "0.7.2"
+version = "0.8.0"
 authors = ["Tristram Gräbener <tristramg@gmail.com>"]
 description = "Convert OpenStreetMap data into routing friendly CSV"
 homepage = "https://github.com/Tristramg/osm4routing2"
@@ -10,6 +10,7 @@ license = "MIT"
 
 [dependencies]
 osmpbfreader = "0.17.0"
+ahash = "0.8"
 csv = "1.3.0"
 clap = { version = "4.5", features = ["derive"] }
 serde = "1.0"
diff --git a/src/osm4routing/models.rs b/src/osm4routing/models.rs
index fb23e7c..159f502 100644
--- a/src/osm4routing/models.rs
+++ b/src/osm4routing/models.rs
@@ -1,4 +1,4 @@
-use std::collections::HashMap;
+use ahash::HashMap;
 use std::hash::{Hash, Hasher};
 
 use super::categorize::EdgeProperties;
@@ -56,7 +56,7 @@ pub struct Edge {
     pub geometry: Vec<Coord>,
     pub properties: EdgeProperties,
     pub nodes: Vec<NodeId>,
-    pub tags: std::collections::HashMap<String, String>,
+    pub tags: HashMap<String, String>,
 }
 
 impl Hash for Edge {
diff --git a/src/osm4routing/reader.rs b/src/osm4routing/reader.rs
index e15ef39..357e63b 100644
--- a/src/osm4routing/reader.rs
+++ b/src/osm4routing/reader.rs
@@ -1,7 +1,7 @@
 use super::categorize::*;
 use super::models::*;
+use ahash::{HashMap, HashMapExt, HashSet, HashSetExt};
 use osmpbfreader::objects::{NodeId, WayId};
-use std::collections::{HashMap, HashSet};
 use std::path::Path;
 
 // Way as represented in OpenStreetMap
@@ -160,7 +160,7 @@ impl Reader {
             }
         }
 
-        for edge in edges.into_iter() {
+        for edge in edges {
             if !already_merged.contains(&edge.id) {
                 result.push(edge);
             }