benchmark very small n values, and add mapping.get benchmarks

2 files changed, 37 insertions, 1 deletions

diff --git a/src/crates/benchmarker/src/mapping.rs b/src/crates/benchmarker/src/mapping.rs
index 9c3d467..964f633 100644
--- a/src/crates/benchmarker/src/mapping.rs
+++ b/src/crates/benchmarker/src/mapping.rs
@@ -4,6 +4,7 @@ use rand::{
     rngs::StdRng,
     Rng,
 };
+use std::hint::black_box;
 
 use crate::{benchmark_op, print_results};
 
@@ -16,6 +17,7 @@ where
 {
     for n in ns {
         scenario_populate::<T, K, V>(rng, *n);
+        scenario_get::<T, K, V>(rng, *n);
         scenario_contains::<T, K, V>(rng, *n);
         scenario_remove::<T, K, V>(rng, *n);
         scenario_clear::<T, K, V>(rng, *n);
@@ -51,6 +53,40 @@ where
     print_results("insert", n, &results);
 }
 
+fn scenario_get<T, K, V>(rng: &mut StdRng, n: usize)
+where
+    T: Mapping<K, V> + Default + Clone,
+    K: Copy,
+    V: Copy,
+    Standard: Distribution<K> + Distribution<V>,
+{
+    let results = benchmark_op(
+        || {
+            let mut c = T::default();
+
+            // decide where the element that we will search for will be
+            let pivot = rng.gen_range(0..n);
+
+            // insert the element at pivot, and keep track of what it is
+            for _ in 0..pivot {
+                c.insert(rng.gen(), rng.gen());
+            }
+            let chosen = rng.gen();
+            c.insert(chosen, rng.gen());
+            for _ in pivot..n {
+                c.insert(rng.gen(), rng.gen());
+            }
+
+            (c, chosen)
+        },
+        |(c, chosen)| {
+            black_box(c.get(chosen));
+        },
+    );
+
+    print_results("get", n, &results);
+}
+
 fn scenario_contains<T, K, V>(rng: &mut StdRng, n: usize)
 where
     T: Mapping<K, V> + Default + Clone,
diff --git a/src/crates/candelabra/src/cost/benchmark.rs b/src/crates/candelabra/src/cost/benchmark.rs
index 45bac5d..812b023 100644
--- a/src/crates/candelabra/src/cost/benchmark.rs
+++ b/src/crates/candelabra/src/cost/benchmark.rs
@@ -25,7 +25,7 @@ pub const ELEM_TYPE: &str = "usize";
 
 /// String representation of the array of N values we use for benchmarking
 pub const NS: &str = "[
-    100, 500, 6_000, 12_000, 24_000, 36_000, 48_000, 60_000
+    10, 100, 500, 6_000, 12_000, 24_000, 36_000, 48_000, 60_000
 ]";
 
 /// Fixed seed for benchmarking