diff --git a/.github/workflow/build.yml b/.github/workflow/build.yml
new file mode 100644
index 0000000..41e921b
--- /dev/null
+++ b/.github/workflow/build.yml
@@ -0,0 +1,28 @@
+on: push
+env:
+  PYTHON_VERSION: 3.7
+  RUST_TOOLCHAIN: nightly
+
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+    name: Build Rust Extension for ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@v3
+      - name: Setup Python
+        uses: actions/setup-python@v4.0.0
+        with:
+          python-version: ${{env.PYTHON_VERSION}}
+          cache: pip
+      - name: Install Rust toolchain
+        uses: actions-rs/toolchain@v1.0.6
+        with:
+          toolchain: ${{env.RUST_TOOLCHAIN}}
+          profile: minimal
+          default: true
+      - name: Build Python Extension
+        run: |
+          python -m build .
diff --git a/.gitignore b/.gitignore
index d26e49d..b50d296 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,7 @@
 rust/target
 rust/.history/
 rust/Cargo.lock
+rust/ed_lrr_test.log
 **/*.rs.bk
 *.tmp
 *.idx
@@ -27,4 +28,4 @@ ed_lrr_gui/web/ed_lrr_web_ui.db
 __version__.py
 .nox/
 dist_vis.py
-img/**
\ No newline at end of file
+img/**
diff --git a/rust/.vscode/settings.json b/rust/.vscode/settings.json
index bf0fd37..ff0c268 100644
--- a/rust/.vscode/settings.json
+++ b/rust/.vscode/settings.json
@@ -16,5 +16,11 @@
         "*.vpy": "python",
         "stat.h": "c"
     },
-    "rust-analyzer.diagnostics.disabled": ["unresolved-import"]
+    "rust-analyzer.diagnostics.disabled": [
+        "unresolved-import"
+    ],
+    "yaml.schemas": {
+        "https://raw.githubusercontent.com/kaitai-io/ksy_schema/master/ksy_schema.json": "*.ksy",
+        "https://json.schemastore.org/github-workflow.json": "file:///d%3A/devel/rust/ed_lrr_gui/.github/workflow/build.yml"
+    }
 }
\ No newline at end of file
diff --git a/rust/Cargo.toml b/rust/Cargo.toml
index fbcaba0..ad841d5 100644
--- a/rust/Cargo.toml
+++ b/rust/Cargo.toml
@@ -23,7 +23,6 @@ csv = "1.1.6"
 humantime = "2.1.0"
 permutohedron = "0.2.4"
 serde_json = "1.0.81"
-fnv = "1.0.7"
 bincode = "1.3.3"
 sha3 = "0.10.1"
 byteorder = "1.4.3"
@@ -43,14 +42,6 @@ eval = "0.4.3"
 pythonize = "0.16.0"
 itertools = "0.10.3"
 rustc-hash = "1.1.0"
-stats_alloc = "0.1.10"
-
-tracing = { version = "0.1.34", optional = true }
-tracing-subscriber = { version = "0.3.11", optional = true }
-tracing-tracy = { version = "0.10.0", optional = true }
-# tracing-unwrap = { version = "0.9.2", optional = true }
-tracy-client = { version = "0.14.0", optional = true }
-tracing-chrome = "0.6.0"
 rand = "0.8.5"
 eyre = "0.6.8"
 memmap = "0.7.0"
@@ -59,9 +50,17 @@ nohash-hasher = "0.2.0"
 dashmap = "5.3.4"
 rayon = "1.5.3"
 
+stats_alloc = {version="0.1.10", optional=true}
+tracing = { version = "0.1.34", optional = true }
+tracing-subscriber = { version = "0.3.11", optional = true }
+tracing-tracy = { version = "0.10.0", optional = true }
+# tracing-unwrap = { version = "0.9.2", optional = true }
+tracy-client = { version = "0.14.0", optional = true }
+tracing-chrome = "0.6.0"
+
 
 [features]
-profiling = ["tracing","tracing-subscriber","tracing-tracy","tracy-client"]
+profiling = ["tracing","tracing-subscriber","tracing-tracy","tracy-client","stats_alloc"]
 
 [dev-dependencies]
 criterion = { version = "0.3.5", features = ["real_blackbox"] }
diff --git a/rust/route_log.txt b/rust/route_log.txt
deleted file mode 100644
index e69de29..0000000
diff --git a/rust/run_test.py b/rust/run_test.py
index 27504ba..58ffd2c 100644
--- a/rust/run_test.py
+++ b/rust/run_test.py
@@ -76,8 +76,8 @@ r.load("../stars.csv", immediate=False)
 # start, end = "Sol", "Colonia"
 # systems = r.resolve(start, end)
 # sys_ids = {k: v["id"] for k, v in systems.items()}
-
-r.bfs_test(JUMP_RANGE)
+r.floyd_warshall_test(JUMP_RANGE)
+# r.bfs_test(JUMP_RANGE)
 
 # cfg = {}
 # cfg["mode"] = "incremental_broadening"
diff --git a/rust/src/lib.rs b/rust/src/lib.rs
index 0143205..efc9936 100644
--- a/rust/src/lib.rs
+++ b/rust/src/lib.rs
@@ -13,13 +13,15 @@ pub mod search_algos;
 pub mod ship;
 
 // =========================
+#[cfg(feature="mem_profiling")]
 use stats_alloc::{Region, StatsAlloc, INSTRUMENTED_SYSTEM};
+#[cfg(feature="mem_profiling")]
 use std::alloc::System as SystemAlloc;
 use std::collections::BTreeMap;
 use std::io::{BufWriter, Write};
 use std::path::Path;
 use std::time::Instant;
-#[cfg(not(feature = "profiling"))]
+#[cfg(feature = "mem_profiling")]
 #[global_allocator]
 static GLOBAL: &StatsAlloc<SystemAlloc> = &INSTRUMENTED_SYSTEM;
 // =========================
@@ -295,13 +297,13 @@ impl PyRouter {
         if is_default && !is_ship {
             warn!("no mode specified, defaulting to {}", mode);
         }
-        #[cfg(not(feature = "profiling"))]
+        #[cfg(feature = "mem_profiling")]
         let reg = Region::new(GLOBAL);
         let res = match self.router.compute_route(&ids, range, mode, num_workers) {
             Ok(route) => Ok(route),
             Err(err_msg) => Err(PyErr::new::<RoutingError, _>(err_msg)),
         };
-        #[cfg(not(feature = "profiling"))]
+        #[cfg(feature = "mem_profiling")]
         println!("{:?}", reg.change());
         return res;
     }
diff --git a/rust/src/route.rs b/rust/src/route.rs
index 92c7554..b73e2f7 100644
--- a/rust/src/route.rs
+++ b/rust/src/route.rs
@@ -1623,16 +1623,17 @@ impl Router {
         info!("nb...");
         let total = self.tree.size();
         for (n, node) in self.tree.iter().enumerate() {
-            if (n % 100_000) == 0 {
-                println!("{}/{}", n, total);
-            }
-            let key = (node.id as u64) << 32;
-            for nb in self.neighbours(node, range) {
-                let key = key | nb.id as u64;
-                dist.entry(key).or_insert(1);
-            }
-            let key = ((node.id as u64) << 32) | node.id as u64;
-            dist.insert(key, 0);
+            println!("{}: {}",node.id,self.neighbours(node, range).count());
+            // if (n % 100_000) == 0 {
+            //     println!("{}/{}", n, total);
+            // }
+            // let key = (node.id as u64) << 32;
+            // for nb in self.neighbours(node, range) {
+            //     let key = key | nb.id as u64;
+            //     dist.entry(key).or_insert(1);
+            // }
+            // let key = ((node.id as u64) << 32) | node.id as u64;
+            // dist.insert(key, 0);
         }
         todo!()
     }
diff --git a/rust/src/search_algos/mod.rs b/rust/src/search_algos/mod.rs
index 7f2ae32..cc63b20 100644
--- a/rust/src/search_algos/mod.rs
+++ b/rust/src/search_algos/mod.rs
@@ -1,6 +1,7 @@
+use rustc_hash::FxHashMap;
+
 use crate::common::TreeNode;
 use crate::route::{Router, SearchState};
-use fnv::FnvHashMap;
 
 trait SearchAlgoImpl<State = (), Weight: Ord = ()> {
     fn get_weight(&mut self, systems: &TreeNode, router: &Router) -> Option<Weight>;
@@ -23,7 +24,7 @@ trait SearchAlgoImpl<State = (), Weight: Ord = ()> {
 
 struct SearchAlgo<'a> {
     algo: Box<dyn SearchAlgoImpl>,
-    prev: FnvHashMap<u32, u32>,
+    prev: FxHashMap<u32, u32>,
     state: Option<SearchState>,
     router: &'a Router,
 }
@@ -40,7 +41,7 @@ impl<'a> SearchAlgo<'a> {
     fn new(router: &'a Router, algo: Box<dyn SearchAlgoImpl>) -> Self {
         Self {
             algo,
-            prev: FnvHashMap::default(),
+            prev: FxHashMap::default(),
             state: None,
             router,
         }