diff --git a/test/EulerSwapHook.swaps.t.sol b/test/EulerSwapHook.swaps.t.sol
index 2cd8ad8..89d80ea 100644
--- a/test/EulerSwapHook.swaps.t.sol
+++ b/test/EulerSwapHook.swaps.t.sol
@@ -126,4 +126,81 @@ contract EulerSwapHookTest is EulerSwapTestBase {
         });
         swapRouter.swap(key, swapParams, settings, "");
     }
+
+
+    // Gas tests
+
+    function test_gas_smallSwap() public {
+        {
+            uint256 amountIn = 1e18;
+
+            assetTST.mint(anyone, amountIn);
+
+            vm.startPrank(anyone);
+            assetTST.approve(address(minimalRouter), amountIn);
+
+            bool zeroForOne = address(assetTST) < address(assetTST2);
+            minimalRouter.swap(eulerSwap.poolKey(), zeroForOne, amountIn, 0, "");
+            vm.snapshotGasLastCall("hook: small swap, fresh");
+            vm.stopPrank();
+        }
+
+        {
+            uint256 amountIn = 1e18;
+
+            assetTST.mint(anyone, amountIn);
+
+            vm.startPrank(anyone);
+            assetTST.approve(address(minimalRouter), amountIn);
+
+            bool zeroForOne = address(assetTST) < address(assetTST2);
+            minimalRouter.swap(eulerSwap.poolKey(), zeroForOne, amountIn, 0, "");
+            vm.snapshotGasLastCall("hook: small swap, existing");
+            vm.stopPrank();
+        }
+
+        {
+            uint256 amountIn = 5e18;
+
+            assetTST2.mint(anyone, amountIn);
+
+            vm.startPrank(anyone);
+            assetTST2.approve(address(minimalRouter), amountIn);
+
+            bool zeroForOne = !(address(assetTST) < address(assetTST2));
+            minimalRouter.swap(eulerSwap.poolKey(), zeroForOne, amountIn, 0, "");
+            vm.snapshotGasLastCall("hook: small swap, cross 0 point");
+            vm.stopPrank();
+        }
+    }
+
+    function test_gas_bigSwap() public {
+        {
+            uint256 amountIn = 30e18;
+
+            assetTST.mint(anyone, amountIn);
+
+            vm.startPrank(anyone);
+            assetTST.approve(address(minimalRouter), amountIn);
+
+            bool zeroForOne = address(assetTST) < address(assetTST2);
+            minimalRouter.swap(eulerSwap.poolKey(), zeroForOne, amountIn, 0, "");
+            vm.snapshotGasLastCall("hook: big swap, fresh");
+            vm.stopPrank();
+        }
+
+        {
+            uint256 amountIn = 60e18;
+
+            assetTST2.mint(anyone, amountIn);
+
+            vm.startPrank(anyone);
+            assetTST2.approve(address(minimalRouter), amountIn);
+
+            bool zeroForOne = !(address(assetTST) < address(assetTST2));
+            minimalRouter.swap(eulerSwap.poolKey(), zeroForOne, amountIn, 0, "");
+            vm.snapshotGasLastCall("hook: big swap, cross 0 point");
+            vm.stopPrank();
+        }
+    }
 }
diff --git a/test/GasTests.t.sol b/test/GasTests.t.sol
new file mode 100644
index 0000000..9bbf663
--- /dev/null
+++ b/test/GasTests.t.sol
@@ -0,0 +1,74 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+pragma solidity ^0.8.24;
+
+import {IEVault, IEulerSwap, EulerSwapTestBase, EulerSwap, TestERC20} from "./EulerSwapTestBase.t.sol";
+
+contract EulerSwapGas is EulerSwapTestBase {
+    EulerSwap public eulerSwap;
+
+    function setUp() public virtual override {
+        super.setUp();
+
+        eulerSwap = createEulerSwap(60e18, 60e18, 0, 1e18, 1e18, 0.9e18, 0.9e18);
+        eulerSwap.activate();
+    }
+
+    function test_gas_smallSwap() public {
+        {
+            uint256 amountIn = 1e18;
+            uint256 amountOut = periphery.quoteExactInput(address(eulerSwap), address(assetTST), address(assetTST2), amountIn);
+
+            assetTST.mint(address(this), amountIn);
+            assetTST.transfer(address(eulerSwap), amountIn);
+
+            eulerSwap.swap(0, amountOut, address(this), "");
+            vm.snapshotGasLastCall("small swap, fresh");
+        }
+
+        {
+            uint256 amountIn = 1e18;
+            uint256 amountOut = periphery.quoteExactInput(address(eulerSwap), address(assetTST), address(assetTST2), amountIn);
+
+            assetTST.mint(address(this), amountIn);
+            assetTST.transfer(address(eulerSwap), amountIn);
+
+            eulerSwap.swap(0, amountOut, address(this), "");
+            vm.snapshotGasLastCall("small swap, existing");
+        }
+
+        {
+            uint256 amountIn = 5e18;
+            uint256 amountOut = periphery.quoteExactInput(address(eulerSwap), address(assetTST2), address(assetTST), amountIn);
+
+            assetTST2.mint(address(this), amountIn);
+            assetTST2.transfer(address(eulerSwap), amountIn);
+
+            eulerSwap.swap(amountOut, 0, address(this), "");
+            vm.snapshotGasLastCall("small swap, cross 0 point");
+        }
+    }
+
+    function test_gas_bigSwap() public {
+        {
+            uint256 amountIn = 30e18;
+            uint256 amountOut = periphery.quoteExactInput(address(eulerSwap), address(assetTST), address(assetTST2), amountIn);
+
+            assetTST.mint(address(this), amountIn);
+            assetTST.transfer(address(eulerSwap), amountIn);
+
+            eulerSwap.swap(0, amountOut, address(this), "");
+            vm.snapshotGasLastCall("big swap, fresh");
+        }
+
+        {
+            uint256 amountIn = 60e18;
+            uint256 amountOut = periphery.quoteExactInput(address(eulerSwap), address(assetTST2), address(assetTST), amountIn);
+
+            assetTST2.mint(address(this), amountIn);
+            assetTST2.transfer(address(eulerSwap), amountIn);
+
+            eulerSwap.swap(amountOut, 0, address(this), "");
+            vm.snapshotGasLastCall("big swap, cross 0 point");
+        }
+    }
+}