Dictionary methods, from the LZ family, constitute the most obvious and actually most successful approach, considering high-speed decompression with moderate memory requirements.
The speeds of WC fall within an intermediate range where decompression speed is significantly lower than the compression speed due to the less contiguous memory access in the irregularly spaced matrix row indices during the inverse wavelet transform.
GASDECOM is typically used for calculating decompression speed, and idealizes the decompression process as isentropic and one-dimensional, taking no account of frictional effects.
2.2.1 and with zfp [4], a recently developed compressor designed for structured data, in terms of accuracy and compression and decompression speed.
The magnitude of the effect of the slower decompression speed on arrest toughness was then evaluated by a comparison involving several hypothetical pipeline designs, and was found to be potentially significant for pipe sizes DN 450 and smaller.
Here the focus was put on compression and decompression speed, not compression ratio.
Concerning sequencing reads (FASTQ), it is possible to obtain (at least) 4.5-fold compression at about 30 MB/s both compression and decompression speed, on a single CPU core.
This algorithm, also based on context mixing, is sometimes even better than Fqzcomp in respect of compression ratio, but its compression and decompression speed is less than 1 MB/s.
Such an approach is successful: the related compressor, GDC [ 39], obtains in its strongest mode the compression ratio of 1,000 for relatively encoded genomes in a collection of 70 human individuals, with decompression speed of 150 MB/s.
Second, we predict that the turbulent period of new compression ideas for sequencing data representations will slowly give way to industry-oriented solutions, with more stress on robustness, flexibility, ease of use, and compression and decompression speed (in sequential and parallel/distributed regimes).
The compression improvement due to this idea is moderate however, so the standard mode (faster and using half of the memory) seems to be more practical, with compression significantly better than DSRC and 10 MB/s to 20 MB/s compression/ decompression speed.
