Move benchmarks under benches/ so tests compile on stable

Closes #36.

benches/bls12_381/fq12.rs

@@ -0,0 +1,98 @@
+use rand::{Rand, SeedableRng, XorShiftRng};
+
+use pairing::Field;
+use pairing::bls12_381::*;
+
+#[bench]
+fn bench_fq12_add_assign(b: &mut ::test::Bencher) {
+    const SAMPLES: usize = 1000;
+
+    let mut rng = XorShiftRng::from_seed([0x5dbe6259, 0x8d313d76, 0x3237db17, 0xe5bc0654]);
+
+    let v: Vec<(Fq12, Fq12)> = (0..SAMPLES).map(|_| {
+        (Fq12::rand(&mut rng), Fq12::rand(&mut rng))
+    }).collect();
+
+    let mut count = 0;
+    b.iter(|| {
+        let mut tmp = v[count].0;
+        tmp.add_assign(&v[count].1);
+        count = (count + 1) % SAMPLES;
+        tmp
+    });
+}
+
+#[bench]
+fn bench_fq12_sub_assign(b: &mut ::test::Bencher) {
+    const SAMPLES: usize = 1000;
+
+    let mut rng = XorShiftRng::from_seed([0x5dbe6259, 0x8d313d76, 0x3237db17, 0xe5bc0654]);
+
+    let v: Vec<(Fq12, Fq12)> = (0..SAMPLES).map(|_| {
+        (Fq12::rand(&mut rng), Fq12::rand(&mut rng))
+    }).collect();
+
+    let mut count = 0;
+    b.iter(|| {
+        let mut tmp = v[count].0;
+        tmp.sub_assign(&v[count].1);
+        count = (count + 1) % SAMPLES;
+        tmp
+    });
+}
+
+#[bench]
+fn bench_fq12_mul_assign(b: &mut ::test::Bencher) {
+    const SAMPLES: usize = 1000;
+
+    let mut rng = XorShiftRng::from_seed([0x5dbe6259, 0x8d313d76, 0x3237db17, 0xe5bc0654]);
+
+    let v: Vec<(Fq12, Fq12)> = (0..SAMPLES).map(|_| {
+        (Fq12::rand(&mut rng), Fq12::rand(&mut rng))
+    }).collect();
+
+    let mut count = 0;
+    b.iter(|| {
+        let mut tmp = v[count].0;
+        tmp.mul_assign(&v[count].1);
+        count = (count + 1) % SAMPLES;
+        tmp
+    });
+}
+
+#[bench]
+fn bench_fq12_squaring(b: &mut ::test::Bencher) {
+    const SAMPLES: usize = 1000;
+
+    let mut rng = XorShiftRng::from_seed([0x5dbe6259, 0x8d313d76, 0x3237db17, 0xe5bc0654]);
+
+    let v: Vec<Fq12> = (0..SAMPLES).map(|_| {
+        Fq12::rand(&mut rng)
+    }).collect();
+
+    let mut count = 0;
+    b.iter(|| {
+        let mut tmp = v[count];
+        tmp.square();
+        count = (count + 1) % SAMPLES;
+        tmp
+    });
+}
+
+#[bench]
+fn bench_fq12_inverse(b: &mut ::test::Bencher) {
+    const SAMPLES: usize = 1000;
+
+    let mut rng = XorShiftRng::from_seed([0x5dbe6259, 0x8d313d76, 0x3237db17, 0xe5bc0654]);
+
+    let v: Vec<Fq12> = (0..SAMPLES).map(|_| {
+        Fq12::rand(&mut rng)
+    }).collect();
+
+    let mut count = 0;
+    b.iter(|| {
+        let tmp = v[count].inverse();
+        count = (count + 1) % SAMPLES;
+        tmp
+    });
+}