Struct JsonFileBaselineStore 

pub struct JsonFileBaselineStore { /* private fields */ }

Filesystem-backed JSON baseline store.

Keys baselines as <root>/<scope>/<name>.json. Save uses write-temp-rename to be atomic on the same filesystem.

Example

use dev_bench::{Baseline, BaselineStore, JsonFileBaselineStore};
let dir = tempfile::tempdir().unwrap();
let store = JsonFileBaselineStore::new(dir.path());
let b = Baseline {
    name: "parse".into(),
    mean_ns: 1234,
    samples: 100,
    ops_per_sec: 800_000.0,
};
store.save("main", &b).unwrap();
let back = store.load("main", "parse").unwrap().unwrap();
assert_eq!(back, b);

Implementations

impl JsonFileBaselineStore

pub fn new(root: impl Into<PathBuf>) -> Self

Build a store rooted at root. The directory is created on first save if it does not exist.

Trait Implementations

impl BaselineStore for JsonFileBaselineStore

fn load(&self, scope: &str, name: &str) -> Result<Option<Baseline>>

Load a baseline if one exists for (scope, name).

fn save(&self, scope: &str, baseline: &Baseline) -> Result<()>

Persist a baseline atomically.