chore: updated benchmark for random dep update

Cargo.toml

@@ -24,7 +24,6 @@ rand = { version = "0.9.0", features = [ "small_rng" ] }
 ahash = "0.8.11"
 clap = { version = "4.5.19", features = ["derive"] }
 priority-queue = "2.1.1"
-#gxhash = "3.4.1"
 memchr = "2.7.4"
 memmap2 = "0.9.5"
 thiserror = "2.0.11"
@@ -33,7 +32,6 @@ thiserror = "2.0.11"
 #debug = true
 
 [dev-dependencies]
-rand_distr = "0.5.0"
 criterion = "0.5.1"
 zipf = "7.0.1"
 

benches/topk_add.rs

@@ -1,17 +1,17 @@
 use criterion::{black_box, criterion_group, criterion_main, Criterion};
-use rand_distr::Distribution;
-use zipf::ZipfDistribution;
+use rand::prelude::*;
+use rand::distr::{Distribution, StandardUniform};
 
 use heavykeeper::TopK;
 
 fn benchmark_topk_add(c: &mut Criterion, num_adds: usize) {
-    let mut rng = rand::thread_rng();
-    let zipf = ZipfDistribution::new(100_000, 1.03).unwrap();
+    let mut rng = rand::rng();
     let mut topk = TopK::new(10, 1024, 2, 0.95);
 
     let mut data = vec![];
     for _ in 0..num_adds {
-        let key = zipf.sample(&mut rng);
+        // Generate positive values using abs() of normal distribution
+        let key = (rng.sample::<f64, StandardUniform>(StandardUniform).abs() * 100_000.0) as u64;
         data.push(key);
     }