This software offers a more efficient version of StringBuilder by delaying buffer allocation until necessary and allocating the exact required size. It streamlines the process to optimize performance.

FastCat is a Java programming tool that features a streamlined and swift version of StringBuffer/StringBuilder. What sets it apart is that it only allocates a buffer at the very last moment and allocates it in the exact size required, making it more efficient.
Using FastCat in Java programs is effortless because it functions similarly to StringBuilder. Its Javadoc should provide all the necessary information. What's more, FastCat is null-safe. When you use one of its append methods and give it a null or a zero-length string, it does nothing. This makes it easier to streamline your application code since there is no need to avoid appending nulls, which might slip past testing with StringBuilder, as it happens only rarely.
FastCat is not suitable if you append one character at a time, so in such cases, it is best to use traditional StringBuilder. However, when you can accurately predict roughly how many chunks you will be appending but have only a vague idea of the final total size, FastCat works very quickly with minimal RAM usage. By minimizing RAM usage, garbage collection occurs less frequently, which speeds it up.
In my experience, switching the HTMLMacros application to FastCat resulted in a 10% speedup. The basic idea behind FastCat is that you estimate how many chunks you concatenate, not the length of the output. Overall, FastCat is a reliable tool that can significantly improve your Java programming experience.
Version 2.4: add toAndList, creates list of form a, b, c and d.