https://github.com/dotnwat/persistent-rbtree
Persistent red-black tree in C++
https://github.com/dotnwat/persistent-rbtree
containers data-structures functional-programming immutable persistent-data-structure red-black-tree
Last synced: 16 days ago
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Persistent red-black tree in C++
- Host: GitHub
- URL: https://github.com/dotnwat/persistent-rbtree
- Owner: dotnwat
- Created: 2018-03-16T05:31:53.000Z (about 7 years ago)
- Default Branch: master
- Last Pushed: 2018-03-21T01:36:15.000Z (about 7 years ago)
- Last Synced: 2025-04-11T21:22:07.926Z (16 days ago)
- Topics: containers, data-structures, functional-programming, immutable, persistent-data-structure, red-black-tree
- Language: C++
- Homepage:
- Size: 20.5 KB
- Stars: 28
- Watchers: 1
- Forks: 3
- Open Issues: 4
-
Metadata Files:
- Readme: README.md
Awesome Lists containing this project
README
# Immutable, persistent red-black tree
```c++
Tree t; // t is empty
auto t0 = t.insert(0, 0); // t0 contains {0,0}
auto t1 = t0.insert(1, 1); // t1 contains {0,0}, {1,1}
```
This is a C++ port of the excellent Rust-based implementation
from https://github.com/orium/rpds.
# Performance (20 March 2018)
All benchmarks run on the following hardware:
```
CPU Two Intel E5-2660 v3 10-core CPUs at 2.60 GHz (Haswell EP)
RAM 160GB ECC Memory (10x 16 GB DDR4 2133 MHz dual rank RDIMMs)
```
The insert workload measures the insertion performance of 1..20 threads
inserting 50,000 random keys to an existing tree containing 1..100M keys. The
keys are uniformly distributed 64-bit integers. Every insertion forms a new
tree that is discarded by the thread, so the base tree never changes.
The `items/s` column below shows the number of keys inserted per second, per
thread.
```
Run on (40 X 3300 MHz CPU s)
CPU Caches:
L1 Data 32K (x20)
L1 Instruction 32K (x20)
L2 Unified 256K (x20)
L3 Unified 25600K (x2)
----------------------------------------------------------------------------
Benchmark Time CPU Iterations
----------------------------------------------------------------------------
BM_Insert/1/50000/threads:1 14585112 ns 14583913 ns 48 3.26961M items/s
BM_Insert/1/50000/threads:2 23006072 ns 46008715 ns 16 1061.28k items/s
BM_Insert/1/50000/threads:4 15072922 ns 60286563 ns 12 809.934k items/s
BM_Insert/1/50000/threads:8 15310274 ns 122472125 ns 8 398.688k items/s
BM_Insert/1/50000/threads:16 16799798 ns 268767090 ns 16 181.674k items/s
BM_Insert/1/50000/threads:20 13710540 ns 274171678 ns 20 178.093k items/s
BM_Insert/10/50000/threads:1 43361104 ns 43357572 ns 16 1126.17k items/s
BM_Insert/10/50000/threads:2 61379752 ns 122750333 ns 6 397.784k items/s
BM_Insert/10/50000/threads:4 34766197 ns 139054203 ns 4 351.145k items/s
BM_Insert/10/50000/threads:8 24842416 ns 198724029 ns 8 245.708k items/s
BM_Insert/10/50000/threads:16 28086838 ns 449349336 ns 16 108.664k items/s
BM_Insert/10/50000/threads:20 22692047 ns 453792110 ns 20 107.6k items/s
BM_Insert/100/50000/threads:1 70612655 ns 70607468 ns 10 691.543k items/s
BM_Insert/100/50000/threads:2 95424727 ns 190834486 ns 4 255.866k items/s
BM_Insert/100/50000/threads:4 51846444 ns 207369635 ns 4 235.464k items/s
BM_Insert/100/50000/threads:8 40646863 ns 325141208 ns 8 150.175k items/s
BM_Insert/100/50000/threads:16 26222879 ns 419515123 ns 16 116.392k items/s
BM_Insert/100/50000/threads:20 26370949 ns 527365311 ns 20 92.5888k items/s
BM_Insert/1000/50000/threads:1 103091920 ns 103068004 ns 7 473.747k items/s
BM_Insert/1000/50000/threads:2 125407984 ns 250795451 ns 2 194.693k items/s
BM_Insert/1000/50000/threads:4 68696828 ns 274758007 ns 4 177.713k items/s
BM_Insert/1000/50000/threads:8 39250971 ns 313970169 ns 8 155.518k items/s
BM_Insert/1000/50000/threads:16 34350680 ns 549554322 ns 16 88.8504k items/s
BM_Insert/1000/50000/threads:20 33472593 ns 669382132 ns 20 72.9451k items/s
BM_Insert/10000/50000/threads:1 136638279 ns 136627041 ns 5 357.383k items/s
BM_Insert/10000/50000/threads:2 146108420 ns 292193495 ns 2 167.109k items/s
BM_Insert/10000/50000/threads:4 80790644 ns 323137977 ns 4 151.106k items/s
BM_Insert/10000/50000/threads:8 46486877 ns 371865944 ns 8 131.306k items/s
BM_Insert/10000/50000/threads:16 30153325 ns 482414772 ns 16 101.216k items/s
BM_Insert/10000/50000/threads:20 26817771 ns 536302848 ns 20 91.0458k items/s
BM_Insert/100000/50000/threads:1 177791213 ns 177777103 ns 4 274.659k items/s
BM_Insert/100000/50000/threads:2 187525013 ns 375018379 ns 2 130.202k items/s
BM_Insert/100000/50000/threads:4 101209401 ns 404806068 ns 4 120.621k items/s
BM_Insert/100000/50000/threads:8 57154975 ns 457184770 ns 8 106.802k items/s
BM_Insert/100000/50000/threads:16 36265690 ns 580188563 ns 16 84.1591k items/s
BM_Insert/100000/50000/threads:20 31374847 ns 627055902 ns 20 77.8689k items/s
BM_Insert/1000000/50000/threads:1 284157682 ns 284132513 ns 2 171.85k items/s
BM_Insert/1000000/50000/threads:2 246166604 ns 492293154 ns 2 99.1851k items/s
BM_Insert/1000000/50000/threads:4 136403581 ns 545572170 ns 4 89.4989k items/s
BM_Insert/1000000/50000/threads:8 76189559 ns 609448143 ns 8 80.1186k items/s
BM_Insert/1000000/50000/threads:16 45518500 ns 728188312 ns 16 67.0543k items/s
BM_Insert/1000000/50000/threads:20 38972236 ns 779353832 ns 20 62.6521k items/s
BM_Insert/10000000/50000/threads:1 388982227 ns 388877223 ns 2 125.562k items/s
BM_Insert/10000000/50000/threads:2 309269358 ns 618416331 ns 2 78.9567k items/s
BM_Insert/10000000/50000/threads:4 171764105 ns 686960578 ns 4 71.0785k items/s
BM_Insert/10000000/50000/threads:8 94066016 ns 752449714 ns 8 64.8922k items/s
BM_Insert/10000000/50000/threads:16 51168286 ns 814673587 ns 16 59.9358k items/s
BM_Insert/10000000/50000/threads:20 46079329 ns 918171791 ns 20 53.1797k items/s
BM_Insert/100000000/50000/threads:1 586921614 ns 586878163 ns 1 83.1998k items/s
BM_Insert/100000000/50000/threads:2 418418581 ns 836669039 ns 2 58.3601k items/s
BM_Insert/100000000/50000/threads:4 234051581 ns 936066969 ns 4 52.1631k items/s
BM_Insert/100000000/50000/threads:8 125203020 ns 1001516619 ns 8 48.7542k items/s
BM_Insert/100000000/50000/threads:16 64886922 ns 1037121993 ns 16 47.0804k items/s
BM_Insert/100000000/50000/threads:20 53904892 ns 1077886906 ns 20 45.2999k items/s
```