To use or not to use the SIMD gather instruction?

Research output: Contribution to book/conference proceedings/anthology/reportConference contributionContributedpeer-review



The Single Instruction Multiple Data (SIMD) paradigm became a core principle for optimizing query operators. Until now, only the LOAD/STORE instructions are considered to be efficient enough to achieve the expected speedups, while avoiding GATHER/SCATTER is considered almost imperative. However, the GATHER instruction offers a very flexible way to populate SIMD registers with data elements coming from non-consecutive memory locations. As we will show within the paper, the GATHER instruction can achieve the same performance as the LOAD instruction, if applied properly. To enable the proper usage, we outline a novel access pattern which then allows fine-grained, partition-based SIMD implementations using the GATHER instruction.


Original languageEnglish
Title of host publicationProceedings of the International Conference on Management of Data, DaMoN 2022
Number of pages5
ISBN (electronic)9781450393782
Publication statusPublished - 12 Jun 2022

External IDs

Scopus 85133393713
Mendeley 72e2749e-6987-3e29-9e76-891e95f97f39
ORCID /0000-0001-8107-2775/work/142253556


Research priority areas of TU Dresden

DFG Classification of Subject Areas according to Review Boards

Subject groups, research areas, subject areas according to Destatis


  • Access Pattern, Experiments, Gather, SIMD