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b79b9f7740ea55178ba13dbaebea614b718c28db
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26 Commits

Author SHA1 Message Date
Dan Kortschak
91a06ac64c graph/path: reduce allocations in path reconstructions 
│   old.bench   │               new.bench               │
                                              │    sec/op     │    sec/op      vs base                │
ShortestAlts/AllTo_100×2|0.5(17)-8              12.380µ ±  9%   8.577µ ±   6%  -30.72% (p=0.000 n=10)
ShortestAlts/AllTo_1000×2|0.5(51)-8              74.87µ ± 17%   47.66µ ±   1%  -36.35% (p=0.000 n=10)
ShortestAlts/AllTo_100×4|0.25(53)-8              25.50µ ±  3%   15.35µ ±   3%  -39.82% (p=0.000 n=10)
ShortestAlts/AllTo_1000×4|0.25(574)-8            556.5µ ±  5%   279.2µ ±   4%  -49.83% (p=0.000 n=10)
ShortestAlts/AllTo_100×16|0.1(76)-8              35.79µ ±  9%   21.71µ ±   3%  -39.35% (p=0.000 n=10)
ShortestAlts/AllTo_1000×16|0.1(822)-8            851.8µ ±  6%   400.5µ ±   6%  -52.98% (p=0.000 n=10)
AllShortest/AllBetween_100×2|0.5(17)-8          12.482µ ±  6%   8.573µ ±   3%  -31.32% (p=0.000 n=10)
AllShortest/AllBetween_1000×2|0.5(51)-8          80.74µ ±  2%   52.90µ ±   4%  -34.48% (p=0.000 n=10)
AllShortest/AllBetween_100×4|0.25(53)-8          22.54µ ±  4%   16.17µ ±   4%  -28.26% (p=0.000 n=10)
AllShortest/AllBetween_1000×4|0.25(574)-8        543.8µ ±  3%   326.7µ ±   5%  -39.93% (p=0.000 n=10)
AllShortest/AllBetween_100×16|0.1(76)-8          31.21µ ±  1%   22.45µ ±   3%  -28.07% (p=0.000 n=10)
AllShortest/AllBetween_1000×16|0.1(822)-8        678.4µ ±  1%   402.5µ ±   3%  -40.67% (p=0.000 n=10)
ShortestAlts/AllToFunc_100×2|0.5(17)-8                          5.892µ ±   2%
ShortestAlts/AllToFunc_1000×2|0.5(51)-8                         40.81µ ±   2%
ShortestAlts/AllToFunc_100×4|0.25(53)-8                         9.178µ ±   2%
ShortestAlts/AllToFunc_1000×4|0.25(574)-8                       214.6µ ±   2%
ShortestAlts/AllToFunc_100×16|0.1(76)-8                         12.62µ ±   3%
ShortestAlts/AllToFunc_1000×16|0.1(822)-8                       310.7µ ±   3%
AllShortest/AllBetweenFunc_100×2|0.5(17)-8                      5.713µ ±   1%
AllShortest/AllBetweenFunc_1000×2|0.5(51)-8                     45.68µ ±   3%
AllShortest/AllBetweenFunc_100×4|0.25(53)-8                     9.775µ ±   1%
AllShortest/AllBetweenFunc_1000×4|0.25(574)-8                   245.2µ ±   5%
AllShortest/AllBetweenFunc_100×16|0.1(76)-8                     13.76µ ±   1%
AllShortest/AllBetweenFunc_1000×16|0.1(822)-8                   314.7µ ±   1%
geomean                                          82.87µ         43.03µ         -38.14%

                                              │   old.bench   │              new.bench               │
                                              │     B/op      │     B/op      vs base                │
ShortestAlts/AllTo_100×2|0.5(17)-8              14.148Ki ± 0%   9.727Ki ± 0%  -31.25% (p=0.000 n=10)
ShortestAlts/AllTo_1000×2|0.5(51)-8              189.8Ki ± 0%   127.5Ki ± 0%  -32.80% (p=0.000 n=10)
ShortestAlts/AllTo_100×4|0.25(53)-8              22.32Ki ± 0%   14.99Ki ± 0%  -32.83% (p=0.000 n=10)
ShortestAlts/AllTo_1000×4|0.25(574)-8           1272.9Ki ± 0%   681.9Ki ± 0%  -46.42% (p=0.000 n=10)
ShortestAlts/AllTo_100×16|0.1(76)-8              33.23Ki ± 0%   22.66Ki ± 0%  -31.79% (p=0.000 n=10)
ShortestAlts/AllTo_1000×16|0.1(822)-8           1799.9Ki ± 0%   953.2Ki ± 0%  -47.04% (p=0.000 n=10)
AllShortest/AllBetween_100×2|0.5(17)-8          13.039Ki ± 0%   8.617Ki ± 0%  -33.91% (p=0.000 n=10)
AllShortest/AllBetween_1000×2|0.5(51)-8          181.5Ki ± 0%   119.3Ki ± 0%  -34.29% (p=0.000 n=10)
AllShortest/AllBetween_100×4|0.25(53)-8          21.34Ki ± 0%   14.01Ki ± 0%  -34.35% (p=0.000 n=10)
AllShortest/AllBetween_1000×4|0.25(574)-8       1264.8Ki ± 0%   673.8Ki ± 0%  -46.72% (p=0.000 n=10)
AllShortest/AllBetween_100×16|0.1(76)-8          32.24Ki ± 0%   21.68Ki ± 0%  -32.76% (p=0.000 n=10)
AllShortest/AllBetween_1000×16|0.1(822)-8       1791.8Ki ± 0%   945.1Ki ± 0%  -47.25% (p=0.000 n=10)
ShortestAlts/AllToFunc_100×2|0.5(17)-8                          6.922Ki ± 0%
ShortestAlts/AllToFunc_1000×2|0.5(51)-8                         119.8Ki ± 0%
ShortestAlts/AllToFunc_100×4|0.25(53)-8                         9.531Ki ± 0%
ShortestAlts/AllToFunc_1000×4|0.25(574)-8                       611.1Ki ± 0%
ShortestAlts/AllToFunc_100×16|0.1(76)-8                         13.12Ki ± 0%
ShortestAlts/AllToFunc_1000×16|0.1(822)-8                       870.7Ki ± 0%
AllShortest/AllBetweenFunc_100×2|0.5(17)-8                      5.812Ki ± 0%
AllShortest/AllBetweenFunc_1000×2|0.5(51)-8                     111.5Ki ± 0%
AllShortest/AllBetweenFunc_100×4|0.25(53)-8                     8.547Ki ± 0%
AllShortest/AllBetweenFunc_1000×4|0.25(574)-8                   603.0Ki ± 0%
AllShortest/AllBetweenFunc_100×16|0.1(76)-8                     12.14Ki ± 0%
AllShortest/AllBetweenFunc_1000×16|0.1(822)-8                   862.6Ki ± 0%
geomean                                          126.5Ki        68.27Ki       -37.99%

                                              │  old.bench  │              new.bench              │
                                              │  allocs/op  │  allocs/op   vs base                │
ShortestAlts/AllTo_100×2|0.5(17)-8              141.00 ± 0%    94.00 ± 0%  -33.33% (p=0.000 n=10)
ShortestAlts/AllTo_1000×2|0.5(51)-8              420.0 ± 0%    269.0 ± 0%  -35.95% (p=0.000 n=10)
ShortestAlts/AllTo_100×4|0.25(53)-8              279.0 ± 0%    174.0 ± 0%  -37.63% (p=0.000 n=10)
ShortestAlts/AllTo_1000×4|0.25(574)-8           2.888k ± 0%   1.741k ± 0%  -39.72% (p=0.000 n=10)
ShortestAlts/AllTo_100×16|0.1(76)-8              395.0 ± 0%    244.0 ± 0%  -38.23% (p=0.000 n=10)
ShortestAlts/AllTo_1000×16|0.1(822)-8           4.128k ± 0%   2.485k ± 0%  -39.80% (p=0.000 n=10)
AllShortest/AllBetween_100×2|0.5(17)-8          136.00 ± 0%    89.00 ± 0%  -34.56% (p=0.000 n=10)
AllShortest/AllBetween_1000×2|0.5(51)-8          415.0 ± 0%    264.0 ± 0%  -36.39% (p=0.000 n=10)
AllShortest/AllBetween_100×4|0.25(53)-8          275.0 ± 0%    170.0 ± 0%  -38.18% (p=0.000 n=10)
AllShortest/AllBetween_1000×4|0.25(574)-8       2.884k ± 0%   1.737k ± 0%  -39.77% (p=0.000 n=10)
AllShortest/AllBetween_100×16|0.1(76)-8          391.0 ± 0%    240.0 ± 0%  -38.62% (p=0.000 n=10)
AllShortest/AllBetween_1000×16|0.1(822)-8       4.124k ± 0%   2.481k ± 0%  -39.84% (p=0.000 n=10)
ShortestAlts/AllToFunc_100×2|0.5(17)-8                         71.00 ± 0%
ShortestAlts/AllToFunc_1000×2|0.5(51)-8                        211.0 ± 0%
ShortestAlts/AllToFunc_100×4|0.25(53)-8                        114.0 ± 0%
ShortestAlts/AllToFunc_1000×4|0.25(574)-8                     1.156k ± 0%
ShortestAlts/AllToFunc_100×16|0.1(76)-8                        160.0 ± 0%
ShortestAlts/AllToFunc_1000×16|0.1(822)-8                     1.652k ± 0%
AllShortest/AllBetweenFunc_100×2|0.5(17)-8                     66.00 ± 0%
AllShortest/AllBetweenFunc_1000×2|0.5(51)-8                    206.0 ± 0%
AllShortest/AllBetweenFunc_100×4|0.25(53)-8                    110.0 ± 0%
AllShortest/AllBetweenFunc_1000×4|0.25(574)-8                 1.152k ± 0%
AllShortest/AllBetweenFunc_100×16|0.1(76)-8                    156.0 ± 0%
AllShortest/AllBetweenFunc_1000×16|0.1(822)-8                 1.648k ± 0%
geomean                                          649.3         336.5       -37.70%
 2023-04-24 20:31:56 +09:30
Dan Kortschak
33227af897 graph/path: fix path extension 
This showed up only in 32 bit architecture builds, but could affect others.
 2020-11-26 10:17:27 +10:30
Dan Kortschak
da72779e7a floats/scalar: new package containing non-vector functions from floats 2020-08-07 07:59:02 +09:30
Dan Kortschak
27220e4f5c graph/path: add missing doc comment 2020-07-12 18:07:51 +09:30
Dan Kortschak
6a06a241d1 graph/path: use a struct to make intentions in negative edges clearer 2020-07-12 18:07:51 +09:30
Dan Kortschak
0631cb635a graph/path: improve negative costs accounting field documentation 2020-07-12 07:26:07 +09:30
Dan Kortschak
04e487c6bc graph/path: add doc comments for unexported path construction methods 2020-07-12 07:26:07 +09:30
Dan Kortschak
9ae0689dae graph/path: add option to retain all paths from single-source path finding routines 2020-07-10 07:22:35 +09:30
Dan Kortschak
3bedd58622 graph/path: properly report negative cycles in Shortest.To 
We still use the maxEdges condition to allow a better exploration of the graph
before terminating.
 2020-07-07 06:20:59 +09:30
Dan Kortschak
8331aaab06 graph/path: fix documentation on Shortest 2020-06-14 17:45:15 +09:30
Dan Kortschak
72a397e184 graph/path: reduce indexing into next in Shortest.To 2020-06-14 17:45:15 +09:30
Dan Kortschak
c5919b2e44 graph/path: make sure absent nodes are returned with the correct ID 2019-12-05 23:30:55 +10:30
Dan Kortschak
97dc6c81b4 graph/path: use NaN internally for negative cycle weights 2019-02-10 06:50:51 +10:30
Dan Kortschak
ee7dd3742a graph/path: indicate negative cycle weights with -Inf instead of NaN 
The paths are undefined, but the limit of the path weight is -Inf.
 2019-02-10 06:50:51 +10:30
Dan Kortschak
936e3fec9e graph/path: fix negative cycle handling by AllShortest and FloydWarshall 
Also remove unjustifiable claim in Bellman-Ford negative cycles example and add
Floyd-Warshall negative cycles example.
 2019-02-10 06:50:51 +10:30
Dan Kortschak
5b0db962f3 graph/path: make AllShortest safe for length zero 2018-11-21 07:57:39 +10:30
Dan Kortschak
f5d91d72f8 graph/path: allow incremental path building for Dijkstra 2018-05-24 07:13:55 +09:30
Dan Kortschak
6b03bc22e1 graph: use int64 for node retrieval 2018-03-24 09:21:44 +10:30
kortschak
fa0c5aa7bc all: use golang.org/x/exp/rand instead of math/rand 2017-11-17 11:52:34 +10:30
kortschak
805531d142 all: change capitalization of gonum in license header 2017-11-02 06:54:08 +10:30
kortschak
f818f8f7a9 graph/path: allow Shortest to traverse negative cycles 
Also add checks for cases where negative cycles exist but are not marked
to protect against future shortest path function additions.
 2017-09-15 08:17:25 +09:30
kortschak
a18d79f600 graph/{internal,path,topo}: factor reverse function out into internal 2017-09-15 07:05:29 +09:30
kortschak
15ecc07d40 graph/path/...: update for int64 IDs 2017-07-02 08:38:42 +09:30
Brendan Tracey
0d639745f1 all: update packages from mat64 to mat. 
This mostly changes package name and code, but also fixes a couple of name clashes with the new package names
 2017-06-13 10:28:21 -06:00
Brendan Tracey
d33397aa65 all: change import paths 2017-05-23 00:03:03 -06:00
Brendan Tracey
059a6c43f9 graph: imported graph as a subtree 2017-05-23 00:02:59 -06:00