Fast and Effective Lossy Compression on GPUs and CPUs with Guaranteed Error Bounds

High-throughput data compression is increasingly important for large scientific projects. This paper presents PFPL, a lossy floating-point data compressor with guaranteed error bounds that is fully compatible between CPUs and GPUs. Despite this compatibility, PFPL delivers some of the highest compression and decompression speeds and compression ratios on both single- and double-precision data. For example, using an absolute error bound of $1 \mathrm{E}-3$, it yields a single-precision compression throughput on the SDRBench inputs of $5 \text{GB} / \mathrm{s}$ on a Ryzen 2950X CPU and 423 GB/s on an RTX 4090 GPU. This is at least 4.6 times higher than the throughput of seven leading compressors on both devices. Moreover, PFPL's compression ratio is higher than that of all tested GPU codes.