most interesting hash_str test

Author: krakow10

benches/creation.rs

@@ -65,6 +65,23 @@ fn criterion_benchmark(c: &mut Criterion) {
         });
     });
 
+    let s = raft.clone();
+    let precomputed_host = hash_str::HashStrHost::new();
+    let mut precomputed_cache = hash_str::HashStrCache::new();
+    let precomputed: Vec<_> = s
+        .iter()
+        .map(|s| precomputed_cache.intern_with(&precomputed_host, s))
+        .collect();
+    c.bench_function("single raft hash_str local precomputed", move |b| {
+        let mut cache = hash_str::HashStrCache::new();
+        b.iter(|| {
+            cache.clear();
+            for s in precomputed.iter().cycle().take(100_000) {
+                black_box(cache.cache(s));
+            }
+        });
+    });
+
     let s = raft.clone();
     c.bench_function("single raft string-interner", move |b| {
         b.iter(|| {