Move Jubjub, Pedersen hash and primitives into zcash_primitives

zcash_primitives/benches/pedersen_hash.rs

@@ -0,0 +1,25 @@
+#![feature(test)]
+
+extern crate rand_core;
+extern crate rand_os;
+extern crate test;
+extern crate pairing;
+extern crate zcash_primitives;
+
+use rand_core::RngCore;
+use rand_os::OsRng;
+use pairing::bls12_381::Bls12;
+use zcash_primitives::jubjub::JubjubBls12;
+use zcash_primitives::pedersen_hash::{pedersen_hash, Personalization};
+
+#[bench]
+fn bench_pedersen_hash(b: &mut test::Bencher) {
+    let params = JubjubBls12::new();
+    let rng = &mut OsRng;
+    let bits = (0..510).map(|_| (rng.next_u32() % 2) != 0).collect::<Vec<_>>();
+    let personalization = Personalization::MerkleTree(31);
+
+    b.iter(|| {
+        pedersen_hash::<Bls12, _>(personalization, bits.clone(), &params)
+    });
+}