Add benchmarks for ranges of i8 and i16

benches/distributions.rs

@@ -29,7 +29,6 @@ fn distr_baseline(b: &mut Bencher) {
     b.bytes = size_of::<f64>() as u64 * ::RAND_BENCH_N;
 }
 
-
 #[bench]
 fn distr_range_int(b: &mut Bencher) {
     let mut rng = XorShiftRng::new().unwrap();
@@ -56,11 +55,10 @@ fn distr_range_float(b: &mut Bencher) {
     b.bytes = size_of::<f64>() as u64 * ::RAND_BENCH_N;
 }
 
-
 #[bench]
 fn distr_range2_int(b: &mut Bencher) {
     let mut rng = XorShiftRng::new().unwrap();
-    let distr = range2::Range::new(3i64, 134217671i64);
+    let distr = range2::Range::new(3i64, 134217671i64); // almost 2^27
 
     b.iter(|| {
         for _ in 0..::RAND_BENCH_N {
@@ -70,6 +68,32 @@ fn distr_range2_int(b: &mut Bencher) {
     b.bytes = size_of::<i64>() as u64 * ::RAND_BENCH_N;
 }
 
+#[bench]
+fn distr_range2_i8(b: &mut Bencher) {
+    let mut rng = XorShiftRng::new().unwrap();
+    let distr = range2::Range::new(20i8, 100i8);
+
+    b.iter(|| {
+        for _ in 0..::RAND_BENCH_N {
+            distr.sample(&mut rng);
+        }
+    });
+    b.bytes = size_of::<i8>() as u64 * ::RAND_BENCH_N;
+}
+
+#[bench]
+fn distr_range2_i16(b: &mut Bencher) {
+    let mut rng = XorShiftRng::new().unwrap();
+    let distr = range2::Range::new(-500i16, 500i16);
+
+    b.iter(|| {
+        for _ in 0..::RAND_BENCH_N {
+            distr.sample(&mut rng);
+        }
+    });
+    b.bytes = size_of::<i8>() as u64 * ::RAND_BENCH_N;
+}
+
 #[bench]
 fn distr_range2_float(b: &mut Bencher) {
     let mut rng = XorShiftRng::new().unwrap();