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andrew
2026-08-02 21:16:27 -04:00
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@@ -7,10 +7,10 @@ Hardware for all benchmarks is an AMD Ryzen 9 7900 with (2x32GB) 5600MT/s CL28-3
```
$ clang++ --version
Ubuntu clang version 20.0.0 (++20241120082228+86734c857724-1~exp1~20241120202359.554)
Ubuntu clang version 21.1.8 (6ubuntu1)
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /usr/lib/llvm-20/bin
InstalledDir: /usr/lib/llvm-21/bin
```
# Microbenchmark
@@ -19,30 +19,30 @@ InstalledDir: /usr/lib/llvm-20/bin
| ns/op | op/s | err% | ins/op | cyc/op | IPC | bra/op | miss% | total | benchmark
|--------------------:|--------------------:|--------:|----------------:|----------------:|-------:|---------------:|--------:|----------:|:----------
| 161.29 | 6,200,056.17 | 0.1% | 3,014.03 | 831.04 | 3.627 | 504.59 | 0.0% | 1.93 | `point reads`
| 158.32 | 6,316,160.64 | 0.1% | 2,954.16 | 815.80 | 3.621 | 490.17 | 0.0% | 1.89 | `prefix reads`
| 237.39 | 4,212,409.50 | 0.2% | 3,592.41 | 1,233.96 | 2.911 | 629.31 | 0.0% | 2.84 | `range reads`
| 442.11 | 2,261,878.94 | 0.0% | 4,450.57 | 2,314.25 | 1.923 | 707.92 | 2.1% | 5.28 | `point writes`
| 439.89 | 2,273,308.53 | 0.1% | 4,410.22 | 2,302.29 | 1.916 | 694.74 | 2.1% | 5.25 | `prefix writes`
| 290.96 | 3,436,936.78 | 0.0% | 2,315.38 | 1,528.68 | 1.515 | 396.69 | 3.3% | 3.49 | `range writes`
| 476.93 | 2,096,762.02 | 0.6% | 6,999.33 | 2,484.94 | 2.817 | 1,251.73 | 1.3% | 0.06 | `monotonic increasing point writes`
| 131,736.57 | 7,590.91 | 1.1% | 807,444.50 | 704,941.71 | 1.145 | 144,584.60 | 0.9% | 0.01 | `worst case for radix tree`
| 45.50 | 21,978,369.95 | 1.1% | 902.00 | 232.36 | 3.882 | 132.00 | 0.0% | 0.01 | `create and destroy`
| 164.29 | 6,086,873.38 | 0.0% | 3,107.03 | 604.19 | 5.142 | 558.59 | 0.0% | 1.96 | `point reads`
| 161.05 | 6,209,395.38 | 0.1% | 3,036.76 | 592.21 | 5.128 | 539.35 | 0.0% | 1.93 | `prefix reads`
| 239.55 | 4,174,539.38 | 0.1% | 3,722.71 | 880.68 | 4.227 | 692.00 | 0.0% | 2.86 | `range reads`
| 354.75 | 2,818,919.14 | 0.7% | 4,523.64 | 1,304.75 | 3.467 | 720.22 | 2.0% | 4.23 | `point writes`
| 345.32 | 2,895,878.47 | 0.1% | 4,484.57 | 1,270.31 | 3.530 | 705.00 | 1.8% | 4.12 | `prefix writes`
| 193.48 | 5,168,547.42 | 0.1% | 2,224.10 | 711.72 | 3.125 | 377.17 | 3.3% | 2.32 | `range writes`
| 404.89 | 2,469,777.50 | 2.4% | 6,855.96 | 1,489.70 | 4.602 | 1,227.82 | 1.3% | 0.05 | `monotonic increasing point writes`
| 134,231.80 | 7,449.80 | 1.9% | 812,045.25 | 495,770.40 | 1.638 | 151,246.50 | 0.9% | 0.01 | `worst case for radix tree`
| 37.80 | 26,454,311.17 | 0.4% | 701.00 | 139.14 | 5.038 | 102.00 | 0.0% | 0.01 | `create and destroy`
## Radix tree (this implementation)
| ns/op | op/s | err% | ins/op | cyc/op | IPC | bra/op | miss% | total | benchmark
|--------------------:|--------------------:|--------:|----------------:|----------------:|-------:|---------------:|--------:|----------:|:----------
| 12.36 | 80,885,626.43 | 0.2% | 243.56 | 63.62 | 3.828 | 31.07 | 0.6% | 0.15 | `point reads`
| 14.18 | 70,502,196.81 | 0.1% | 297.72 | 73.13 | 4.071 | 40.31 | 0.5% | 0.17 | `prefix reads`
| 33.44 | 29,901,623.04 | 0.1% | 767.90 | 172.42 | 4.454 | 101.32 | 0.2% | 0.40 | `range reads`
| 19.48 | 51,342,564.70 | 0.3% | 374.45 | 100.43 | 3.728 | 48.92 | 0.5% | 0.23 | `point writes`
| 37.46 | 26,694,471.44 | 0.1% | 672.00 | 193.14 | 3.479 | 101.28 | 0.3% | 0.45 | `prefix writes`
| 38.78 | 25,784,784.34 | 0.0% | 738.26 | 199.93 | 3.693 | 111.59 | 0.1% | 0.47 | `range writes`
| 76.05 | 13,148,995.74 | 0.7% | 1,450.77 | 397.16 | 3.653 | 275.72 | 0.0% | 0.01 | `monotonic increasing point writes`
| 286,920.33 | 3,485.29 | 0.4% | 4,117,948.00 | 1,521,352.00 | 2.707 | 714,833.00 | 0.1% | 0.01 | `worst case for radix tree`
| 95.66 | 10,453,798.72 | 0.5% | 1,986.00 | 495.04 | 4.012 | 315.00 | 0.0% | 0.01 | `create and destroy`
| 12.89 | 77,565,115.56 | 0.1% | 244.55 | 47.43 | 5.155 | 34.21 | 0.6% | 0.15 | `point reads`
| 15.11 | 66,162,047.76 | 0.1% | 297.79 | 55.60 | 5.356 | 43.23 | 0.4% | 0.18 | `prefix reads`
| 36.29 | 27,559,358.29 | 0.1% | 783.16 | 133.44 | 5.869 | 109.52 | 0.2% | 0.43 | `range reads`
| 20.53 | 48,719,405.55 | 0.1% | 381.81 | 75.51 | 5.057 | 51.04 | 0.5% | 0.25 | `point writes`
| 39.37 | 25,402,042.40 | 0.1% | 685.00 | 144.83 | 4.730 | 106.72 | 0.3% | 0.47 | `prefix writes`
| 43.78 | 22,843,841.63 | 0.1% | 800.40 | 161.06 | 4.970 | 127.36 | 0.1% | 0.53 | `range writes`
| 78.37 | 12,760,008.75 | 1.0% | 1,452.61 | 288.24 | 5.040 | 278.69 | 0.1% | 0.01 | `monotonic increasing point writes`
| 322,885.50 | 3,097.07 | 1.5% | 4,362,382.00 | 1,183,852.00 | 3.685 | 765,301.00 | 0.1% | 0.01 | `worst case for radix tree`
| 99.99 | 10,000,718.79 | 0.4% | 1,775.00 | 367.93 | 4.824 | 288.00 | 0.0% | 0.01 | `create and destroy`
# "Real data" test
@@ -51,13 +51,13 @@ Point queries only. Gc ratio is the ratio of time spent doing garbage collection
## skip list
```
Check: 4.53508 seconds, 371.81 MB/s, Add: 3.81222 seconds, 150.919 MB/s, Gc ratio: 33.66%, Peak idle memory: 5.61007e+06
Check: 4.62967 seconds, 352.195 MB/s, Add: 3.34177 seconds, 167.771 MB/s, Gc ratio: 37.9399%, Peak idle memory: 5.51852e+06
```
## radix tree
```
Check: 0.957735 seconds, 1760.6 MB/s, Add: 1.19942 seconds, 479.678 MB/s, Gc ratio: 38.6069%, Peak idle memory: 2.05667e+06
Check: 1.00477 seconds, 1622.8 MB/s, Add: 1.21142 seconds, 462.808 MB/s, Gc ratio: 39.4716%, Peak idle memory: 2.0226e+06
```
## hash table
@@ -65,6 +65,6 @@ Check: 0.957735 seconds, 1760.6 MB/s, Add: 1.19942 seconds, 479.678 MB/s, Gc rat
(The hash table implementation doesn't work on range queries, and its purpose is to provide an idea of how fast point queries can be)
```
Check: 0.804598 seconds, 2095.69 MB/s, Add: 0.671221 seconds, 857.147 MB/s, Gc ratio: 35.0034%, Peak idle memory: 0
Check: 0.854254 seconds, 1908.74 MB/s, Add: 0.632626 seconds, 886.232 MB/s, Gc ratio: 41.0827%, Peak idle memory: 0
```