The port of the DDSketch rust implementation.
- CubicallyInterpolatedMapping
- LogarithmicMapping
- CollapsingHighestDenseStore: collapse the highest bucket when reach specified size
- CollapsingLowestDenseStore: collapse the lowest bucket when reach specified size
- UnboundedSizeDenseStore: unlimited bucket
- Merge with other instance
- Serialize & Deserialize
Run the following Cargo command in your project directory:
cargo add sketches-rust
Or add the following line to your Cargo.toml:
sketches-rust = "0.2.2"
Query:
use sketches_rust::DDSketch;
let mut d = DDSketch::collapsing_lowest_dense(0.02,100).unwrap();
d.accept(1.0);
d.accept(2.0);
d.accept(3.0);
let c = d.get_count();
assert_eq!(c, 3.0);
let q = d.get_value_at_quantile(0.5).unwrap();
assert!(q < 2.01 && q > 1.99);Merge:
use sketches_rust::DDSketch;
let mut d1 = DDSketch::collapsing_lowest_dense(0.02,100).unwrap();
d1.accept(1.0);
d1.accept(2.0);
d1.accept(3.0);
assert_eq!(3.0, d1.get_count());
let mut d2 = DDSketch::collapsing_lowest_dense(0.02,100).unwrap();
d2.accept(1.0);
d2.accept(2.0);
d2.accept(3.0);
assert_eq!(3.0, d2.get_count());
d2.merge_with(&mut d1).unwrap();
assert_eq!(6.0, d2.get_count());Serialize:
use sketches_rust::DDSketch;
let mut d = DDSketch::unbounded_dense(2e-2).unwrap();
d.accept(1.0);
d.accept(2.0);
d.accept(3.0);
d.accept(4.0);
d.accept(5.0);
println!("encode: {:?}", d.encode().unwrap());Deserialize:
use sketches_rust::DDSketch;
let mut input = vec![
2, 42, 120, 57, 5, 47, 167, 240, 63, 0, 0, 0, 0, 0, 0, 0, 0, 13, 50, 130, 1, 2, 136, 32, 0,
3, 0, 0, 0, 3, 0, 2, 0, 0, 3, 3, 2, 2, 3, 3, 2, 0, 0, 0, 0, 2, 0, 2, 2, 2, 4, 4, 132, 64,
0, 4, 2, 0, 2, 2, 3, 132, 64, 4, 132, 64, 4, 2, 2, 0, 6, 4, 6, 132, 64, 2, 6,
];
let mut d = DDSketch::decode(&input).unwrap();
assert_eq!(d.get_count(), 100.0);
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