1. I don&#x27;t see any reason why Lua (presumably you mean LuaJIT?) and PHP 7 would be faster than Java or C#. The compilation techniques are the same, except that Java and C# have more mature JITs.<p>2. Java and C# JITs perform many more optimizations than Go 6g&#x2F;8g do.<p>3. Objective-C message passing is a lot slower than method calls in Java and C#.