KDTrees

[josevalim]

No description provided.

[josevalim]

The numbers are really good. For N=1000 on the CPU:

Name               ips        average  deviation         median         99th %
banded          250.39        3.99 ms    ±40.61%        3.28 ms        9.97 ms
unbanded          5.64      177.35 ms    ±25.45%      175.40 ms      387.83 ms

Comparison:
banded          250.39
unbanded          5.64 - 44.41x slower +173.35 ms

Memory usage statistics:

Name        Memory usage
banded        0.00551 MB
unbanded         4.50 MB - 817.51x memory usage +4.50 MB

**All measurements for memory usage were the same**

[josevalim]

GPU, N=1_000_00 (ht @polvalente)

Operating System: Linux
CPU Information: 13th Gen Intel(R) Core(TM) i9-13900KS
Number of Available Cores: 32
Available memory: 125.53 GB
Elixir 1.15.1
Erlang 26.0.2

Benchmark suite executing with the following configuration:
warmup: 2 s
time: 10 s
memory time: 2 s
reduction time: 0 ns
parallel: 1
inputs: none specified
Estimated total run time: 28 s

Benchmarking banded 1M ...
Benchmarking unbanded 1M ...
    
Name                  ips        average  deviation         median         99th %
banded 1M           55.01    0.00030 min     ±2.15%    0.00030 min    0.00032 min
unbanded 1M        0.0167       1.00 min     ±0.00%       1.00 min       1.00 min

Comparison: 
banded 1M           55.01
unbanded 1M        0.0167 - 3301.18x slower +1.00 min

Memory usage statistics:

Name           Memory usage
banded 1M        0.00001 GB
unbanded 1M         4.44 GB - 825455.53x memory usage +4.44 GB

**All measurements for memory usage were the same**

[krstopro]

What is the dimension of the data you used for benchmarks?

Update: I see it's equal to 3, sorry for asking this.

[josevalim]

To add to your question/answer, the dimension should not impact the results, as we don't store the tensors and we only cycle through them.

[jonatanklosko]

Is this the wording they use in one of the papers? I would expect "bounds" and bounded/2.

[josevalim]

No paper uses it, the idea is that it would reflect "frequency bands" but I think bound and unbound is more common. It may be a bit confusing because they are not really unbound and more of a question if the bounds are known and reasonable.

[josevalim]

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