Is StringBuilder faster than StringBuffer if synchronization is removed?

Yes, even without considering synchronization, StringBuilder can be faster than StringBuffer. Both implementations use an internal character array to store data. StringBuilder is optimized by lacking synchronization in most of its methods, reducing overhead compared to StringBuffer.

The main performance differences manifest during active string modification operations (adding, inserting, deleting), where the absence of synchronized in StringBuilder provides an advantage.

Example:

// Example does not directly demonstrate performance difference,
// but shows absence of synchronized in StringBuilder.
// StringBuffer:
// public synchronized StringBuffer append(String str) { ... }
// StringBuilder:
// public StringBuilder append(String str) { ... }

In single-threaded scenarios or when synchronization is managed externally, StringBuilder is preferred due to its potentially better performance.