ZPM
pdqsort
ZPM | pdqsort | |
---|---|---|
- | 9 | |
26 | 2,288 | |
- | - | |
0.0 | 0.0 | |
almost 6 years ago | 5 months ago | |
Lua | C++ | |
MIT License | zlib License |
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pdqsort
- Pattern-Defeating Quicksort (Pdqsort)
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Faster sorting algorithm
I found that this exists: https://github.com/orlp/pdqsort
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How sorting algorithms work
Their sort_unstable algorithm is based on this pattern-defeating quicksort.
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Timsort – the fastest sorting algorithm you’ve never heard of
Closely related is pattern defeating quicksort ( https://github.com/orlp/pdqsort ), which adapts quicksort to take advantage of sorted runs. I've adapted a few quicksorts to pdqsort and seen good speedups (as people were often sorting partially sorted data)
Basically: Timsort is to mergesort as pdqsort is to quicksort
- I tried creating a sorting algorithm in C language.
- Do Low-Level Optimizations Matter?
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Discussion Thread
I was thinking of optimal C++ over native types. I just spoke up because if your intuition of quicksort is that 50k elements should take 20ms you’re drastically underestimating computer performance. They’re crazy fast and optimized sorting algorithms are downright scary.
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Beating Up on Qsort (2019)
Just for fun, I added pdqsort to the benchmark:
https://github.com/orlp/pdqsort
Here are some of the results on an Ivy Bridge hackintosh:
size, qsort, inline, sort, stable_sort, pdqsort, radix7
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Which sorting algorithm did you implement in your programming language?
sort_unstable is a pattern-defeating quicksort (https://github.com/orlp/pdqsort) added with RFC#1884 (https://github.com/rust-lang/rfcs/pull/1884).
What are some alternatives?
access_profiler - a tool to count accesses to member variables in c++ programs
fluxsort - A fast branchless stable quicksort / mergesort hybrid that is highly adaptive.
stb - stb single-file public domain libraries for C/C++
American Fuzzy Lop - american fuzzy lop - a security-oriented fuzzer
Cppcheck - static analysis of C/C++ code
quadsort - Quadsort is a branchless stable adaptive mergesort faster than quicksort.
C++ Format - A modern formatting library
ZBar - Clone of the mercurial repository http://zbar.hg.sourceforge.net:8000/hgroot/zbar/zbar
Klib - A standalone and lightweight C library
ZXing - ZXing ("Zebra Crossing") barcode scanning library for Java, Android
PHP CPP - Library to build PHP extensions with C++