Fast Base64 Decode

fast-base64-decode is a JavaScript library providing a high-performance, low-level Base64 decoder. Its current stable version is 2.0.0, released in October 2022. The library differentiates itself by offering a direct, byte-array-oriented API, requiring the user to pre-allocate `Uint8Array` buffers and specify the exact output length. This approach is optimized for speed and memory efficiency, contrasting with higher-level alternatives like `base64-js` which handle buffer allocation automatically. It is primarily used for decoding Base64 strings where performance is critical and granular control over the output buffer is desired. The package has a moderate release cadence, with major versions aligning with significant architectural shifts like its recent conversion to an ECMAScript module.