diff --git a/hbs2-tests/hie.yaml b/hbs2-tests/hie.yaml
new file mode 100644
index 00000000..9e651b52
--- /dev/null
+++ b/hbs2-tests/hie.yaml
@@ -0,0 +1,10 @@
+cradle:
+  cabal:
+    - path: "test/Peer2Main.hs"
+      component: "hbs2-tests:exe:test-peer-run"
+
+    - path: "test/TestSKey"
+      component: "hbs2-tests:test:test-skey"
+
+
+
diff --git a/hbs2-tests/test/TestSKey.hs b/hbs2-tests/test/TestSKey.hs
new file mode 100644
index 00000000..983fd7b8
--- /dev/null
+++ b/hbs2-tests/test/TestSKey.hs
@@ -0,0 +1,106 @@
+module Main where
+
+import HBS2.Net.Proto.Sessions
+import HBS2.Hash
+
+
+import Control.Monad
+import Control.Concurrent.STM
+import Data.ByteString (ByteString)
+import Data.ByteString.Lazy.Char8 as B
+import Data.Cache (Cache)
+import Data.Cache qualified as Cache
+import Data.Map qualified as Map
+import qualified Data.Vector.Unboxed as U
+import System.Random.MWC
+import System.TimeIt
+import Test.QuickCheck
+import Data.HashMap.Strict qualified as HashMap
+
+main :: IO ()
+main = do
+  g <- initialize $ U.fromList [0xFACABAC]
+
+
+
+  ss <- replicateM 1000 $ do
+          bytes <- replicateM 256 $ uniformM g :: IO [Char]
+          pure $ hashObject @HbSync (B.pack bytes)
+
+  timeItNamed "Cache (Hash HbSync)" $ do
+
+    replicateM_ 1000 $ do
+
+      m1 <- Cache.newCache Nothing :: IO (Cache (Hash HbSync) ())
+
+      forM_ ss $ \key -> Cache.insert m1 key ()
+      forM_ ss $ \key -> Cache.lookup' m1 key
+
+
+  timeItNamed "Cache (SKey)" $ do
+
+    let keys = fmap newSKey ss
+
+    replicateM_ 1000 $ do
+
+      m1 <- Cache.newCache Nothing
+
+      forM_ keys $ \key -> Cache.insert m1 key ()
+      forM_ keys $ \key -> Cache.lookup' m1 key
+
+
+  timeItNamed "HashMap (Hash HbSync)" $ do
+
+    let keys = ss
+
+    replicateM_ 1000 $ do
+
+      m1 <- newTVarIO mempty -- .newCache Nothing
+
+      forM_ keys $ \key -> do
+        atomically $ modifyTVar' m1 (HashMap.insert key ())
+        -- Cache.insert m1 key ()
+
+      forM_ keys $ \key -> do
+        m <- readTVarIO m1
+        let !x = HashMap.lookup key m
+        pure ()
+
+  timeItNamed "HashMap (Skey)" $ do
+
+    let keys = fmap newSKey ss
+
+    replicateM_ 1000 $ do
+
+      m1 <- newTVarIO mempty -- .newCache Nothing
+
+      forM_ keys $ \key -> do
+        atomically $ modifyTVar' m1 (HashMap.insert key ())
+        -- Cache.insert m1 key ()
+
+      forM_ keys $ \key -> do
+        m <- readTVarIO m1
+        let !x = HashMap.lookup key m
+        pure ()
+
+
+  timeItNamed "Map (Hash HbSync)" $ do
+
+    let keys = ss
+
+    replicateM_ 1000 $ do
+
+      m1 <- newTVarIO mempty -- .newCache Nothing
+
+      forM_ keys $ \key -> do
+        atomically $ modifyTVar' m1 (Map.insert key ())
+        -- Cache.insert m1 key ()
+
+      forM_ keys $ \key -> do
+        m <- readTVarIO m1
+        let !x = Map.lookup key m
+        pure ()
+
+
+  pure ()
+