Benchmark against BZip2 general compression.

Storage efficiency is calculated as the ratio of the size of compressed data with each method (H, H+T or H+T+D) vs BZip2 compressed data size, expressed as a percentage. A storage efficiency of 50% indicates that the specific method compressed the dataset to half the size of method BZip2 compression. Compression/Decompression time ratios measure the ratio of the time it takes a specific method to compress/decompress a dataset compared to the time it takes the BZip2 compression method for the same dataset. A ratio of 200% indicates that the specific method is twice slower than BZip2. See Fig. 1 for a description of the H, H+T and H+T+D methods.