sdsl | Succinct Data Structure Library | File Utils library

sdsl is a C++ library typically used in Utilities, File Utils, Example Codes applications. sdsl has no bugs, it has no vulnerabilities and it has low support. However sdsl has a Non-SPDX License. You can download it from GitHub.

This is a C++ template library for succinct data structures called sdsl. Succinct data structures are fascinating: They represent an object (like a bitvector, a tree, suffix array,…​) in space close the information-theoretic lower bound of the object but the defined operations can still be performed efficiently. Hmmm, at least in theory ;) Actually there is still a big gap between theory and practice. Why? The time complexity of an operations performed on the classical fat data structure and the slim succinct data structure are the same most time in theory. However, in practice succinct structures are slow since the operations require often memory accesses with bad locality of references. Moreover, often the in theory small sub-linear space data structures account for a large amount of memory, since they are only asymptotic sub-linear and the input size for which they are negligible in practice is galactic. The aim of the library is to provide basic and complex succinct data structure which are * easy to use (the library is structure like the [STL] which provides classical data structures), * capable of handling large inputs (yes, we support 64-bit), * provide excellent performance in construction, and * provide excellent operation performance. A lot of engineering tricks had to be applied to reach the performance goal, for instance the use a semi-external algorithm, bit-parallelism on 64-bit words, and cache-friendly algorithms.