diff --git a/.github/workflows.rar b/.github/workflows.rar
deleted file mode 100644
index 81c8ec1d..00000000
Binary files a/.github/workflows.rar and /dev/null differ
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
new file mode 100644
index 00000000..b23cb7b1
--- /dev/null
+++ b/.github/workflows/main.yml
@@ -0,0 +1,126 @@
+name: build
+on: [push, pull_request]
+jobs:
+  build_win:
+    runs-on: windows-latest
+    steps:
+    - uses: actions/checkout@v3
+    - uses: ilammy/msvc-dev-cmd@v1
+    - name: Compile
+      shell: bash
+      run: |
+        python3 build.py windows
+        python3 build.py windows -lib
+        mkdir -p output/windows/x86_64
+        cp pocketpy.exe output/windows/x86_64
+        cp pocketpy.dll output/windows/x86_64
+    - uses: actions/upload-artifact@v3
+      with:
+        path: output
+    - name: Unit Test
+      run: python3 scripts/run_tests.py
+    - name: Benchmark
+      run: python3 scripts/run_tests.py benchmark
+  build_linux:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+    - name: Setup Clang
+      uses: egor-tensin/setup-clang@v1
+      with:
+        version: 15
+        platform: x64
+    - name: Install libc++
+      run: sudo apt install -y libc++-15-dev libc++1-15 libc++abi-15-dev libc++abi1-15 libclang-rt-15-dev
+    # - name: Coverage Test
+    #   run: |
+    #     python3 preprocess.py
+    #     bash run_tests.sh
+    # - uses: actions/upload-artifact@v3
+    #   with:
+    #     name: coverage
+    #     path: .coverage
+    - name: Compile
+      run: |
+        python3 build.py linux
+        python3 build.py linux -lib
+        mkdir -p output/linux/x86_64
+        cp pocketpy output/linux/x86_64
+        cp pocketpy.so output/linux/x86_64
+    - uses: actions/upload-artifact@v3
+      with:
+        path: output
+    - name: Unit Test
+      run: python3 scripts/run_tests.py
+    - name: Benchmark
+      run: python3 scripts/run_tests.py benchmark
+  build_macos:
+      runs-on: macos-latest
+      steps:
+      - uses: actions/checkout@v3
+      - run: |
+          python3 amalgamate.py
+          cd plugins/macos/pocketpy
+          mkdir -p output/macos
+          xcodebuild clean build CODE_SIGN_IDENTITY="" CODE_SIGNING_REQUIRED=NO CODE_SIGNING_ALLOWED=NO
+          cp -r build/Release/pocketpy.bundle output/macos
+      - uses: actions/upload-artifact@v3
+        with:
+          path: plugins/macos/pocketpy/output
+  build_android:
+      runs-on: ubuntu-latest
+      steps:
+      - uses: actions/checkout@v3
+      - uses: subosito/flutter-action@v2
+        with:
+          flutter-version: '3.3.0'
+          channel: 'stable'
+          cache: true
+      - run: flutter --version
+      - name: Compile
+        run: |
+          python3 amalgamate.py
+          cd plugins/flutter/example
+          flutter build apk --split-debug-info=.debug-info --split-per-abi
+          cd build/app/outputs/flutter-apk
+          mkdir -p output/android/arm64-v8a
+          mkdir -p output/android/armeabi-v7a
+          mkdir -p output/android/x86_64
+          unzip -q app-arm64-v8a-release.apk -d tmp
+          mv tmp/lib/arm64-v8a/libpocketpy.so output/android/arm64-v8a/libpocketpy.so
+          rm -rf tmp
+          unzip -q app-armeabi-v7a-release.apk -d tmp
+          mv tmp/lib/armeabi-v7a/libpocketpy.so output/android/armeabi-v7a/libpocketpy.so
+          rm -rf tmp
+          unzip -q app-x86_64-release.apk -d tmp
+          mv tmp/lib/x86_64/libpocketpy.so output/android/x86_64/libpocketpy.so
+          rm -rf tmp
+      - uses: actions/upload-artifact@v3
+        with:
+          path: plugins/flutter/example/build/app/outputs/flutter-apk/output
+  build_web:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+    - name: Setup emsdk
+      uses: mymindstorm/setup-emsdk@v12
+      with:
+        version: 3.1.25
+        actions-cache-folder: 'emsdk-cache'
+    - name: Verify emsdk
+      run: emcc -v
+    - name: Compile
+      run: |
+        mkdir -p output/web/lib
+        python3 build.py web
+        cp web/lib/* output/web/lib
+    - uses: crazy-max/ghaction-github-pages@v3
+      with:
+        target_branch: gh-pages
+        build_dir: web
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      if: github.event_name == 'push' && github.ref == 'refs/heads/main'
+    - uses: actions/upload-artifact@v3
+      with:
+        path: output
\ No newline at end of file
diff --git a/build.py b/build.py
index 42f3de6a..f186572f 100644
--- a/build.py
+++ b/build.py
@@ -20,7 +20,7 @@ def lib_pre_build():
 def lib_post_build():
     os.remove("src/tmp.cpp")
 
-windows_common = "clang-cl.exe -std:c++17 /utf-8 -GR- -EHsc -O2 -Wno-deprecated-declarations"
+windows_common = "CL -std:c++17 /utf-8 -GR- -EHsc -O2"
 windows_cmd = windows_common + " -Fe:pocketpy src/main.cpp"
 windows_lib_cmd = windows_common + " -LD -Fe:pocketpy src/tmp.cpp"
 
diff --git a/run_profile.sh b/run_profile.sh
index 652107c4..c7bea6c3 100644
--- a/run_profile.sh
+++ b/run_profile.sh
@@ -1,4 +1,3 @@
-# THIS SCRIPT IS NOT WORKING
 clang++ -pg -O2 -std=c++17 -fno-rtti -stdlib=libc++ -Wall -o pocketpy src/main.cpp
 time ./pocketpy benchmarks/fib.py
 mv benchmarks/gmon.out .
diff --git a/run_profile_test.sh b/run_profile_test.sh
new file mode 100644
index 00000000..9d7ccc71
--- /dev/null
+++ b/run_profile_test.sh
@@ -0,0 +1,10 @@
+clang++ -O2 -std=c++17 -fno-rtti --coverage -stdlib=libc++ -Wall -o pocketpy src/main.cpp
+time ./pocketpy benchmarks/fib.py
+rm -rf .coverage
+mkdir -p .coverage
+llvm-cov-15 gcov main.gc -r -s src/ >> .coverage/coverage.txt
+mv *.gcov .coverage
+rm main.gc*
+
+# -fprofile-instr-generate -fcoverage-mapping 
+# llvm-cov-15 show main.gc -instr-profile=default.profraw -format=html -output-dir .coverage
\ No newline at end of file
diff --git a/src/common.h b/src/common.h
index e9ce5ecf..5e9661f6 100644
--- a/src/common.h
+++ b/src/common.h
@@ -3,6 +3,7 @@
 #ifdef _MSC_VER
 #pragma warning (disable:4267)
 #pragma warning (disable:4101)
+#pragma warning (disable:4244)
 #define _CRT_NONSTDC_NO_DEPRECATE
 #define strdup _strdup
 #endif
diff --git a/src/vm.h b/src/vm.h
index e294a538..f4eb40e0 100644
--- a/src/vm.h
+++ b/src/vm.h
@@ -204,9 +204,9 @@ public:
     PyObject* new_type_object(PyObject* mod, StrName name, Type base){
         PyObject* obj = heap._new<Type>(tp_type, _all_types.size());
         PyTypeInfo info{
-            .obj = obj,
-            .base = base,
-            .name = (mod!=nullptr && mod!=builtins) ? Str(OBJ_NAME(mod)+"."+name.sv()): name.sv()
+            obj,
+            base,
+            (mod!=nullptr && mod!=builtins) ? Str(OBJ_NAME(mod)+"."+name.sv()): name.sv()
         };
         if(mod != nullptr) mod->attr().set(name, obj);
         _all_types.push_back(info);
@@ -626,8 +626,8 @@ inline Str VM::disassemble(CodeObject_ co){
 }
 
 inline void VM::init_builtin_types(){
-    _all_types.push_back({.obj = heap._new<Type>(Type(1), Type(0)), .base = -1, .name = "object"});
-    _all_types.push_back({.obj = heap._new<Type>(Type(1), Type(1)), .base = 0, .name = "type"});
+    _all_types.push_back({heap._new<Type>(Type(1), Type(0)), -1, "object"});
+    _all_types.push_back({heap._new<Type>(Type(1), Type(1)), 0, "type"});
     tp_object = 0; tp_type = 1;
 
     tp_int = _new_type_object("int");