added hash speed benchmark

afl/Cargo.toml

@@ -8,11 +8,20 @@ edition = "2018"
 
 [dev-dependencies]
 criterion = "0.3" # Benchmarking
+xxhash-rust = { version = "0.8.0-beta.5", features = ["const_xxh3", "xxh3"] } # xxh3 hashing for rust
+ahash = "0.6.1" # another hash
+fxhash = "0.2.1" # yet another hash
 
 [[bench]]
 name = "rand_speeds"
 harness = false
 
+[[bench]]
+name = "hash_speeds"
+harness = false
+
+
+
 [features]
 default = ["std"]
 std = []
@@ -21,7 +30,7 @@ std = []
 hashbrown =  { version = "0.9", features = ["serde"] } # A faster hashmap, nostd compatible
 libc = "0.2" # For (*nix) libc
 num = "*"
-xxhash-rust = { version = "0.8.0-beta.5", features = ["const_xxh3"] } # xxh3 hashing for rust
+xxhash-rust = { version = "0.8.0-beta.5", features = ["xxh3"] } # xxh3 hashing for rust
 serde = { version = "1.0", default-features = false, features = ["alloc"] } # serialization lib
 typetag = "0.1"
 postcard = "0.5.1" # no_std compatible serde serialization fromat

afl/benches/hash_speeds.rs

@@ -0,0 +1,38 @@
+//! Compare the speed of rust hash implementations
+
+use ahash;
+use fxhash;
+use std::hash::Hasher;
+use xxhash_rust::const_xxh3;
+use xxhash_rust::xxh3;
+
+use afl::utils::{Rand, StdRand};
+use criterion::{black_box, criterion_group, criterion_main, Criterion};
+
+fn criterion_benchmark(c: &mut Criterion) {
+    let mut rand = StdRand::new(0);
+    let mut bench_vec: Vec<u8> = vec![];
+    for _ in 0..2 << 16 {
+        bench_vec.push(rand.below(256) as u8);
+    }
+
+    c.bench_function("xxh3", |b| {
+        b.iter(|| xxh3::xxh3_64_with_seed(black_box(&bench_vec), 0))
+    });
+    c.bench_function("const_xxh3", |b| {
+        b.iter(|| const_xxh3::xxh3_64_with_seed(black_box(&bench_vec), 0))
+    });
+    c.bench_function("ahash", |b| {
+        b.iter(|| {
+            let mut hasher = ahash::AHasher::new_with_keys(123, 456);
+            hasher.write(black_box(&bench_vec));
+            hasher.finish();
+        })
+    });
+    c.bench_function("fxhash", |b| {
+        b.iter(|| fxhash::hash64(black_box(&bench_vec)))
+    });
+}
+
+criterion_group!(benches, criterion_benchmark);
+criterion_main!(benches);

afl/benches/rand_speeds.rs

@@ -1,3 +1,5 @@
+//! Compare the speed of rand implementations
+
 use afl::utils::{Rand, XorShift64Rand, Xoshiro256StarRand};
 use criterion::{black_box, criterion_group, criterion_main, Criterion};
 

afl/src/utils.rs

@@ -303,7 +303,7 @@ pub const fn next_pow2(val: u64) -> u64 {
 
 #[cfg(test)]
 mod tests {
-    use xxhash_rust::const_xxh3::xxh3_64_with_seed;
+    use xxhash_rust::xxh3::xxh3_64_with_seed;
 
     use crate::utils::{next_pow2, Rand, StdRand};
 
@@ -340,8 +340,4 @@ mod tests {
         assert_eq!(next_pow2(0xFFFFFFFF as u64), (0xFFFFFFFF as u64) + 1);
     }
     
-    #[test]
-    fn test_xxh3_hash() {
-        assert_eq!(xxh3_64_with_seed(b"test", 0), 0);
-    }
 }