Update the benchmarks

benches/lib.rs

@@ -1,18 +1,20 @@
 #![feature(test)]
 
+extern crate complex;
 extern crate fft;
 extern crate test;
 
-#[bench] fn forward_0004(bencher: &mut test::Bencher) { forward(   4, bencher); }
-#[bench] fn forward_0016(bencher: &mut test::Bencher) { forward(  16, bencher); }
-#[bench] fn forward_0064(bencher: &mut test::Bencher) { forward(  64, bencher); }
-#[bench] fn forward_0256(bencher: &mut test::Bencher) { forward( 256, bencher); }
-#[bench] fn forward_1024(bencher: &mut test::Bencher) { forward(1024, bencher); }
-#[bench] fn forward_4096(bencher: &mut test::Bencher) { forward(4096, bencher); }
+use complex::c64;
+use test::{Bencher, black_box};
 
-fn forward(size: usize, bencher: &mut test::Bencher) {
-    let mut data = vec![fft::c64(42.0, 0.0); size];
-    bencher.iter(|| {
-        test::black_box(fft::forward(&mut data));
-    });
+#[bench] fn complex_forward_0004(bencher: &mut Bencher) { complex_forward(   4, bencher); }
+#[bench] fn complex_forward_0016(bencher: &mut Bencher) { complex_forward(  16, bencher); }
+#[bench] fn complex_forward_0064(bencher: &mut Bencher) { complex_forward(  64, bencher); }
+#[bench] fn complex_forward_0256(bencher: &mut Bencher) { complex_forward( 256, bencher); }
+#[bench] fn complex_forward_1024(bencher: &mut Bencher) { complex_forward(1024, bencher); }
+#[bench] fn complex_forward_4096(bencher: &mut Bencher) { complex_forward(4096, bencher); }
+
+fn complex_forward(size: usize, bencher: &mut Bencher) {
+    let mut data = vec![c64(42.0, 0.0); size];
+    bencher.iter(|| black_box(fft::complex::forward(&mut data)));
 }