Reduce the amount of llvm IR instantiated

benches/bench.rs

@@ -86,7 +86,7 @@ macro_rules! bench_insert {
             b.iter(|| {
                 m.clear();
                 for i in ($keydist).take(SIZE) {
-                    m.insert(i, DropType(i));
+                    m.insert(i, (DropType(i), [i; 20]));
                 }
                 black_box(&mut m);
             });
@@ -105,6 +105,31 @@ bench_suite!(
     insert_std_random
 );
 
+macro_rules! bench_grow_insert {
+    ($name:ident, $maptype:ident, $keydist:expr) => {
+        #[bench]
+        fn $name(b: &mut Bencher) {
+            b.iter(|| {
+                let mut m = $maptype::default();
+                for i in ($keydist).take(SIZE) {
+                    m.insert(i, DropType(i));
+                }
+                black_box(&mut m);
+            })
+        }
+    };
+}
+
+bench_suite!(
+    bench_grow_insert,
+    grow_insert_ahash_serial,
+    grow_insert_std_serial,
+    grow_insert_ahash_highbits,
+    grow_insert_std_highbits,
+    grow_insert_ahash_random,
+    grow_insert_std_random
+);
+
 macro_rules! bench_insert_erase {
     ($name:ident, $maptype:ident, $keydist:expr) => {
         #[bench]

ci/run.sh

@@ -9,7 +9,7 @@ if [ "${NO_STD}" = "1" ]; then
     FEATURES="rustc-internal-api"
     OP="build"
 else
-    FEATURES="rustc-internal-api,serde,rayon"
+    FEATURES="rustc-internal-api,serde,rayon,raw"
     OP="test"
 fi
 if [ "${TRAVIS_RUST_VERSION}" = "nightly" ]; then

src/lib.rs

@@ -57,6 +57,11 @@ pub mod raw {
     pub use inner::*;
 
     #[cfg(feature = "rayon")]
+    /// [rayon]-based parallel iterator types for hash maps.
+    /// You will rarely need to interact with it directly unless you have need
+    /// to name one of the iterator types.
+    ///
+    /// [rayon]: https://docs.rs/rayon/1.0/rayon
     pub mod rayon {
         pub use crate::external_trait_impls::rayon::raw::*;
     }