[llvm-bugs] [Bug 35613] New: Optimizing std::search function

via llvm-bugs llvm-bugs at lists.llvm.org
Sun Dec 10 13:22:01 PST 2017


https://bugs.llvm.org/show_bug.cgi?id=35613

            Bug ID: 35613
           Summary: Optimizing std::search function
           Product: libc++
           Version: unspecified
          Hardware: PC
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: All Bugs
          Assignee: unassignedclangbugs at nondot.org
          Reporter: zamazan4ik at tut.by
                CC: llvm-bugs at lists.llvm.org, mclow.lists at gmail.com

std::search can be optmized for Random Access Iterators by implementing inside
search algorithm like Boyer-Moore or Boyer-Moore-Horspool or Musser-Nishanov
algorithm (or smth faster). For Bidirectional iterators AFAIK Crochemore-Perrin
algorithm is very good.

AFAIK, now std::search use only naive search algortihm. Can be it improved?

P.S. I know about changes in C++17 new search algorithms, but i suggest use the
most efficient version for every type of iterators.

P.S.S Efficient algorithms you can find in Seqan library and in
Boost.Algorithm.

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