The FastPFOR library is a high-performance C/C++ integer compression library focused on decoding throughput. It implements a comprehensive collection of state-of-the-art compression schemes, including FastPFor, SIMD-Binary-Packing, PFor variants, Simple8b/16, VariableByte, and StreamVByte, many leveraging SIMD instructions (SSE, AVX, NEON) for maximum speed. The library is designed for workloads requiring efficient storage and fast random access of sorted integer lists, such as inverted indexes in search engines, column stores, and database systems. The architecture is centered around a clean IntegerCODEC interface with encodeArray and decodeArray methods. A CODECFactory provides runtime selection of codecs by name. A notable CompositeCodec pattern allows wrapping block-oriented codecs with a tail codec for arbitrary input lengths. The codebase also includes a rich set of benchmarking and analysis tools (e.g., codecs, inmemorybenchmark, gapstats, entropy) and synthetic data generators for performance evaluation. The library is actively maintained with extensive CI coverage across Linux, macOS, and Windows (including ARM64). While the codebase exhibits some characteristics of a research project—such as repetitive generated-looking code, explicit warnings about buffer overruns in the README, and the presence of legacy build files—the core library components are well-structured and demonstrate high craftsmanship. It is a mature, production-quality library used by or influencing systems like Apache Lucene and DuckDB. The quality score is 8.0/10, reflecting its strong architecture, clean interfaces, and genuinely reusable components, balanced against the inherent complexity and research-oriented nature of the code. It is a highly valuable resource for any system requiring fast integer compression.