Add profiling tools, examples

Cargo.toml

@@ -36,3 +36,6 @@ members = [
 	"validator_client",
 	"account_manager",
 ]
+
+[profile.release]
+debug = true

eth2/utils/ssz/Cargo.toml

@@ -4,7 +4,12 @@ version = "0.1.0"
 authors = ["Paul Hauner <paul@paulhauner.com>"]
 edition = "2018"
 
+[[bench]]
+name = "benches"
+harness = false
+
 [dev-dependencies]
+criterion = "0.2"
 ssz_derive = { path = "../ssz_derive" }
 
 [dependencies]

eth2/utils/ssz/benches/benches.rs

@@ -0,0 +1,38 @@
+#[macro_use]
+extern crate criterion;
+
+use criterion::black_box;
+use criterion::{Benchmark, Criterion};
+use ssz::{Decodable, Encodable};
+
+fn criterion_benchmark(c: &mut Criterion) {
+    let n = 8196;
+
+    let vec: Vec<u64> = vec![4242; 8196];
+    c.bench(
+        &format!("vec_of_{}_u64", n),
+        Benchmark::new("as_ssz_bytes", move |b| {
+            b.iter_with_setup(|| vec.clone(), |vec| black_box(vec.as_ssz_bytes()))
+        })
+        .sample_size(100),
+    );
+
+    let vec: Vec<u64> = vec![4242; 8196];
+    let bytes = vec.as_ssz_bytes();
+    c.bench(
+        &format!("vec_of_{}_u64", n),
+        Benchmark::new("from_ssz_bytes", move |b| {
+            b.iter_with_setup(
+                || bytes.clone(),
+                |bytes| {
+                    let vec: Vec<u64> = Vec::from_ssz_bytes(&bytes).unwrap();
+                    black_box(vec)
+                },
+            )
+        })
+        .sample_size(100),
+    );
+}
+
+criterion_group!(benches, criterion_benchmark);
+criterion_main!(benches);

eth2/utils/ssz/examples/large_list.rs

@@ -0,0 +1,16 @@
+//! Encode and decode a list 10,000 times.
+//!
+//! Useful for `cargo flamegraph`.
+
+use ssz::{Decodable, Encodable};
+
+fn main() {
+    let vec: Vec<u64> = vec![4242; 8196];
+
+    let output: Vec<Vec<u64>> = (0..10_000)
+        .into_iter()
+        .map(|_| Vec::from_ssz_bytes(&vec.as_ssz_bytes()).unwrap())
+        .collect();
+
+    println!("{}", output.len());
+}