bitblast: wip cxx_compile_time_optimizations

youtube/video_series/bit_blast/cxx_compile_time_optimization/script.md

@@ -19,30 +19,31 @@ or Mold Linker
 
 As you can see, mold uses all available cores throughout its execution and finishes quickly. In contrast, lld fails to utilize available cores most of the time. 
 
-On a side-note, this project could you financial support...
 The next step is to replace Make with
 ## Ninja 
 no not this guy, but the build tool.
 
-CCache
+## CCache
 
-Upgrade Compilers
+## Upgrade Compilers
 
 Next item is... disabling your
-Anti Virus
+## Anti Virus / Windows Defender
 
-Ensure Parallel Build
+# Ensure Parallel Build
 
 -- Code Changes -- (from least to most intrusive)
-Minimize Includes
+# Modules
 
-Forward Declaration
 
-Precompiled Headers
+# Minimize Includes
 
-Unity Builds
+# Forward Declaration
+
+# Precompiled Headers
+
+# Unity Builds
 
-Modules
 
 -- Shut Up and Take My Money --
 Upgrade Hardware
@@ -50,7 +51,7 @@ Upgrade Hardware
 Build Over Network
 
 
-# Sources
+# References
 
 ## Repositories
 Mold: https://github.com/rui314/mold

youtube/video_series/bit_blast/cxx_compile_time_optimization/snippets/big.hpp

@@ -0,0 +1,13 @@
+#pragma once
+
+// Assume this file includes many other files...
+// Which accumulate to 50'000 lines of source code!
+
+class Big
+{
+public:
+	Big(int foo)
+	{
+	}
+};
+

youtube/video_series/bit_blast/cxx_compile_time_optimization/snippets/forward_decl.cpp

@@ -0,0 +1,10 @@
+#include "./forward_decl.hpp"
+
+// This inclusion will not leak to other header files...
+#include "./big.hpp"
+
+IncludedManyTimes::IncludedManyTimes():
+    m_large_dependency(new Big { 1 })
+{
+}
+

youtube/video_series/bit_blast/cxx_compile_time_optimization/snippets/forward_decl.hpp

@@ -0,0 +1,16 @@
+#pragma once
+// This file will be included MANY times...
+
+// Option A: forward declare on top of the file
+class Big;
+
+class IncludedManyTimes
+{
+public:
+	IncludedManyTimes();
+
+private:
+	// Option B: forward declare when delcaring the variable
+	/* class */ Big *m_large_dependency;
+};
+

youtube/video_series/bit_blast/cxx_compile_time_optimization/snippets/include_is_copy_paste.cpp

@@ -0,0 +1,8 @@
+#include <iostream>
+
+int main()
+{
+    std::cout << "Hello world!" << std::endl;
+    return 0;
+
+#include "./right_curly_brace.hpp"

youtube/video_series/bit_blast/cxx_compile_time_optimization/snippets/right_curly_brace.hpp

@@ -0,0 +1 @@
+}

youtube/video_series/bit_blast/cxx_compile_time_optimization/snippets/unused_headers.cpp

@@ -0,0 +1,6 @@
+#include <iostream>
+
+int main()
+{
+	return 0;
+}