eyros 4.6.2

multi-dimensional interval database
Documentation 
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use eyros::{DB,Tree2,Coord,Setup,Row};
use rand::random;
use std::path::PathBuf;
use std::time;

type P = (Coord<f32>,Coord<f32>);
type V = u32;
type E = Box<dyn std::error::Error+Sync+Send>;

#[async_std::main]
async fn main() -> Result<(),E> {
  let args: Vec<String> = std::env::args().collect();
  let base = PathBuf::from(args[1].clone());
  let mut db: DB<_,Tree2<f32,f32,V>,P,V> = Setup::from_path(&base)
    .branch_factor(5)
    .max_records(3_000)
    .build()
    .await?;
  let batch_size = 10_000;
  let mut count = 0_u64;
  let mut total = 0f64;
  for _ in 0..100 {
    let rows: Vec<Row<P,V>> = (0..batch_size).map(|_| {
      let xmin: f32 = random::<f32>()*2.0-1.0;
      let xmax: f32 = xmin + random::<f32>().powf(64.0)*(1.0-xmin);
      let ymin: f32 = random::<f32>()*2.0-1.0;
      let ymax: f32 = ymin + random::<f32>().powf(64.0)*(1.0-ymin);
      let value: u32 = random();
      let point = (
        Coord::Interval(xmin,xmax),
        Coord::Interval(ymin,ymax)
      );
      Row::Insert(point, value)
    }).collect();
    let batch_start = time::Instant::now();
    db.batch(&rows).await?;
    let batch_elapsed = batch_start.elapsed().as_secs_f64();
    count += batch_size;
    total += batch_elapsed;
    println!["{}: batch for {} records in {} seconds",
      count, batch_size, batch_elapsed];
  }
  let sync_start = time::Instant::now();
  db.sync().await?;
  let sync_elapsed = sync_start.elapsed().as_secs_f64();
  total += sync_elapsed;
  println!["# sync in {} seconds", sync_elapsed];
  println!["# wrote {} records in {} seconds\n# {} records / second",
    count, total, (count as f64) / total];
  Ok(())
}