On the Optimisation of the GSACA Suffix Array Construction Algorithm
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The suffix array is arguably one of the most important data structures in sequence analysis and consequently there is a multitude of suffix sorting algorithms. However, to this date the algorithm introduced in 2015 is the only known non-recursive linear-time suffix array construction algorithm (SACA). Despite its interesting theoretical properties, there has been little effort in improving the algorithm's subpar real-world performance. There is a super-linear algorithm which relies on the same sorting principle and is faster than , the fastest SACA for over a decade. This paper is concerned with analysing the sorting principle used in and and exploiting its properties in order to give an optimised linear-time algorithm. Our resulting algorithm is not only significantly faster than but also outperforms and .
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