quadsort
fastrange
| quadsort | fastrange | |
|---|---|---|
| 9 | 1 | |
| 2,106 | 296 | |
| - | - | |
| 4.6 | 1.8 | |
| 6 months ago | about 3 years ago | |
| C | C | |
| The Unlicense | Apache License 2.0 |
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quadsort
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10~17x faster than what? A performance analysis of Intel x86-SIMD-sort (AVX-512)
https://github.com/scandum/quadsort/blob/f171a0b26cf6bd6f6dc...
As you can see, quadsort 1.1.4.1 used 2 instead of 4 writes in the bi-directional parity merges. This was in June 2021, and would have compiled as branchless with clang, but as branched with gcc.
When I added a compile time check to use ternary operations for clang I was not adapting your work. I was well aware that clang compiled ternary operations as branchless, but I wasn't aware that rust did as well. I added the compile time check to use ternary operations for a fair performance comparison against glidesort.
https://raw.githubusercontent.com/scandum/fluxsort/main/imag...
As for ipnsort's small sort, it is very similar to quadsort's small sort, which uses stable sorting networks, instead of unstable sorting networks. From my perspective it's not exactly novel. I didn't go for unstable sorting networks in crumsort to increase code reuse, and to not reduce adaptivity.
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Show HN: QuadSort, Esoteric Fast Sort
In the code it looks like the seed to the benchmark can be provided as the 4th command line argument: https://github.com/scandum/quadsort/blob/master/src/bench.c#...
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When does big-oh notation become not helpful when comparing algorithms?
If you look at sorting for example, it's been proven that you can't do a comparison-based sort faster than O(n logn). You may then think that we've already found the fastest possible sorting algorithms since Quicksort and Mergesort are already O(n logn). However, new sorting algorithms keep being invented, for example Quadsort. They're all still O(n logn), but they do offer a considerable speed improvement over more traditional algorithms
- quadsort 1.1.5.1: Up to 2.5x faster than qsort() on random data
- Quadsort 1.1.5.1: Introducing cost effective branchless merging
- I tried creating a sorting algorithm in C language.
fastrange
What are some alternatives?
pdqsort - Pattern-defeating quicksort.
IntervalUtility - .Net C # utility for working with intervals, such as time periods. The utility allows you to find intersections of periods, exclude periods, etc.
fluxsort - A fast branchless stable quicksort / mergesort hybrid that is highly adaptive.
HSL - HSL to RGB and RGB to HSL
blitsort - Blitsort is an in-place stable adaptive rotate mergesort / quicksort.
Klib - A standalone and lightweight C library
sort-test - A simple sort benchmarking tool
rotate - A collection of array rotation algorithms.
sort-research-rs - Test and benchmark suite for sort implementations.
piposort - Piposort is a small branchless stable adaptive mergesort.
rhsort - Robin Hood Sort, for uniform data