Create a comprehensive analysis of how at least 10 different programming languages (including Python, JavaScript, Java, C++, Go, Rust, and others) handle empty string "" operations. Cover: 1) Memory allocation differences 2) String concatenation behavior 3) Comparison operations 4) Type coercion 5) Performance implications 6) Empty string as default parameter 7) Null vs empty string distinctions. Provide code examples demonstrating each behavior and discuss the trade-offs in different design decisions.