}
}
-#[cfg(feature = "bench")]
-#[bench]
-fn bench_insertion(b: &mut ::test::Bencher) {
- b.iter(|| {
- let mut data = AnyMap::new();
- for _ in 0..100 {
+#[cfg(all(feature = "bench", test))]
+mod bench {
+ use AnyMap;
+ use test::Bencher;
+
+ #[bench]
+ fn insertion(b: &mut Bencher) {
+ b.iter(|| {
+ let mut data = AnyMap::new();
+ for _ in 0..100 {
+ let _ = data.insert(42);
+ }
+ })
+ }
+
+ #[bench]
+ fn get_missing(b: &mut Bencher) {
+ b.iter(|| {
+ let data = AnyMap::new();
+ for _ in 0..100 {
+ assert_eq!(data.get(), None::<&i32>);
+ }
+ })
+ }
+
+ #[bench]
+ fn get_present(b: &mut Bencher) {
+ b.iter(|| {
+ let mut data = AnyMap::new();
let _ = data.insert(42);
- }
- })
-}
+ // These inner loops are a feeble attempt to drown the other factors.
+ for _ in 0..100 {
+ assert_eq!(data.get(), Some(&42));
+ }
+ })
+ }
-#[cfg(feature = "bench")]
-#[bench]
-fn bench_get_missing(b: &mut ::test::Bencher) {
- b.iter(|| {
- let data = AnyMap::new();
- for _ in 0..100 {
- assert_eq!(data.get(), None::<&i32>);
- }
- })
-}
+ macro_rules! big_benchmarks {
+ ($name:ident, $($T:ident)*) => (
+ #[bench]
+ fn $name(b: &mut Bencher) {
+ $(
+ #[derive(Debug, PartialEq)]
+ struct $T(&'static str);
+
+ impl Default for $T {
+ fn default() -> $T {
+ $T(stringify!($T))
+ }
+ }
+ )*
+
+ b.iter(|| {
+ let mut data = AnyMap::new();
+ $(
+ assert_eq!(data.insert($T::default()), None::<$T>);
+ )*
+ $(
+ assert_eq!(data.get(), Some(&$T::default()));
+ )*
+ })
+ }
+ );
+ }
-#[cfg(feature = "bench")]
-#[bench]
-fn bench_get_present(b: &mut ::test::Bencher) {
- b.iter(|| {
- let mut data = AnyMap::new();
- let _ = data.insert(42);
- // These inner loops are a feeble attempt to drown the other factors.
- for _ in 0..100 {
- assert_eq!(data.get(), Some(&42));
- }
- })
+ // Pathalogical rustc/llvm case here. This takes *absurdly* long to compile (it adds something
+ // like 100 seconds), peaking at over 1GB of RAM (though -Z time-passes doesn’t pick up on
+ // that, as it’s in the middle of the “llvm modules passes [0]” that it happens and it’s all
+ // freed at the end of that pass) and adding over 700KB to the final build. (3KB per type is
+ // more than I expected, reasonably or unreasonably.) TODO determine why and get it fixed.
+ //
+ // Selected rustc -Z time-passes output, with and without this block:
+ //
+ // - item-bodies checking: 0.4 seconds without, 5.2 seconds with;
+ // - borrow checking: 0.1 seconds without, 11 seconds with;
+ // - llvm module passes [0]: 2.5 seconds without, 49 seconds with;
+ // - codegen passes [0]: 0.6 seconds without, 11.2 seconds with.
+ //
+ // Very not good.
+ big_benchmarks! {
+ insert_and_get_on_260_types,
+ A0 B0 C0 D0 E0 F0 G0 H0 I0 J0 K0 L0 M0 N0 O0 P0 Q0 R0 S0 T0 U0 V0 W0 X0 Y0 Z0
+ A1 B1 C1 D1 E1 F1 G1 H1 I1 J1 K1 L1 M1 N1 O1 P1 Q1 R1 S1 T1 U1 V1 W1 X1 Y1 Z1
+ A2 B2 C2 D2 E2 F2 G2 H2 I2 J2 K2 L2 M2 N2 O2 P2 Q2 R2 S2 T2 U2 V2 W2 X2 Y2 Z2
+ A3 B3 C3 D3 E3 F3 G3 H3 I3 J3 K3 L3 M3 N3 O3 P3 Q3 R3 S3 T3 U3 V3 W3 X3 Y3 Z3
+ A4 B4 C4 D4 E4 F4 G4 H4 I4 J4 K4 L4 M4 N4 O4 P4 Q4 R4 S4 T4 U4 V4 W4 X4 Y4 Z4
+ A5 B5 C5 D5 E5 F5 G5 H5 I5 J5 K5 L5 M5 N5 O5 P5 Q5 R5 S5 T5 U5 V5 W5 X5 Y5 Z5
+ A6 B6 C6 D6 E6 F6 G6 H6 I6 J6 K6 L6 M6 N6 O6 P6 Q6 R6 S6 T6 U6 V6 W6 X6 Y6 Z6
+ A7 B7 C7 D7 E7 F7 G7 H7 I7 J7 K7 L7 M7 N7 O7 P7 Q7 R7 S7 T7 U7 V7 W7 X7 Y7 Z7
+ A8 B8 C8 D8 E8 F8 G8 H8 I8 J8 K8 L8 M8 N8 O8 P8 Q8 R8 S8 T8 U8 V8 W8 X8 Y8 Z8
+ A9 B9 C9 D9 E9 F9 G9 H9 I9 J9 K9 L9 M9 N9 O9 P9 Q9 R9 S9 T9 U9 V9 W9 X9 Y9 Z9
+ }
+
+ big_benchmarks! {
+ insert_and_get_on_26_types,
+ A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
+ }
}
#[cfg(test)]