Argmm

Argmin/max with SIMD support for i32 and f32 arrays and vectors.

Getting started

You can use the extention trait which will take advantage of SIMD if available ```rust use argmm::ArgMinMax;

fn main() { let v = vec![1., 3., -20., 50., -82., 9., -53., 60., 0.]; let minindex = v.argmin(); let maxindex = v.argmax(); asserteq!(minindex, Some(4)); asserteq!(maxindex, Some(7)); } ```

Alternatively, the generic function can be used if you require non-SIMD support for other types

```rust use argmm::generic::{simpleargmin, simpleargmax};

fn main() { let v = vec![1u8, 3, 20, 50, 82, 9, 53, 60, 0]; let minindex = simpleargmin(&v); let maxindex = simpleargmax(&v); asserteq!(minindex, 8); asserteq!(maxindex, 4); } ```

Benchmarks

MacBook Pro (Retina, 13-inch, Early 2015) Processor 2.7 GHz Dual-Core Intel Core i5 with an array size of 512.

|Type|Function|Time|Factor| |---|---|---|---| |f32|simpleargmin|536.91 ns|1| |f32|argminsimd |157.30 ns|3.14|

|Type|Function|Time|Factor| |---|---|---|---| |f32|simpleargmax|531.54 ns|1| |f32|argmaxsimd |157.08 ns|3.38|

|Type|Function|Time|Factor| |---|---|---|---| |i32|simpleargmin|343.02 ns|1| |i32|argminsimd |203.30 ns|1.68|

|Type|Function|Time|Factor| |---|---|---|---| |i32|simpleargmax|350.06 ns|1| |i32|argmaxsimd |191.45 ns|1.82|

Warning

NAN values are not supported.

License

Licensed under either of * Apache License, Version 2.0 (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0) * MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT) at your option.