TEST: Add benchmarks for parallel collect

Author: bluss

benches/par_rayon.rs

@@ -136,3 +136,39 @@ fn rayon_add(bench: &mut Bencher) {
         });
     });
 }
+
+const COLL_STRING_N: usize = 64;
+const COLL_F64_N: usize = 128;
+
+#[bench]
+fn vec_string_collect(bench: &mut test::Bencher) {
+    let v = vec![""; COLL_STRING_N * COLL_STRING_N];
+    bench.iter(|| {
+        v.iter().map(|s| s.to_owned()).collect::<Vec<_>>()
+    });
+}
+
+#[bench]
+fn array_string_collect(bench: &mut test::Bencher) {
+    let v = Array::from_elem((COLL_STRING_N, COLL_STRING_N), "");
+    bench.iter(|| {
+        Zip::from(&v).par_apply_collect(|s| s.to_owned())
+    });
+}
+
+#[bench]
+fn vec_f64_collect(bench: &mut test::Bencher) {
+    let v = vec![1.; COLL_F64_N * COLL_F64_N];
+    bench.iter(|| {
+        v.iter().map(|s| s + 1.).collect::<Vec<_>>()
+    });
+}
+
+#[bench]
+fn array_f64_collect(bench: &mut test::Bencher) {
+    let v = Array::from_elem((COLL_F64_N, COLL_F64_N), 1.);
+    bench.iter(|| {
+        Zip::from(&v).par_apply_collect(|s| s + 1.)
+    });
+}
+