initial microbenchmarks with cargo bench

benchmarks/micro/src/lib.rs

@@ -0,0 +1,31 @@
+#![feature(test)]
+
+extern crate test;
+
+pub fn add_two(a: i32) -> i32 {
+    a + 2
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use rusqlite::Connection;
+    use test::Bencher;
+
+    #[test]
+    fn it_works() {
+        assert_eq!(4, add_two(2));
+    }
+
+    #[bench]
+    fn bench_add_two(b: &mut Bencher) {
+        let db = Connection::open_in_memory().unwrap();
+        let v: Vec<f32> = vec![0.1, 0.2, 0.3];
+
+        b.iter(|| {
+            let sqlite_version: String = db
+                .query_row("select sqlite_version()", [], |x| x.get(0))
+                .unwrap();
+        });
+    }
+}