From 0c3026f7dec56e013478d896e1a088d10bdc0411 Mon Sep 17 00:00:00 2001 From: Chris Morgan Date: Sat, 11 Jun 2016 10:06:13 +1000 Subject: [PATCH] Add more benchmarking Including a rustc/llvm pathalogical case. --- src/lib.rs | 124 ++++++++++++++++++++++++++++++++++++++++------------- 1 file changed, 94 insertions(+), 30 deletions(-) diff --git a/src/lib.rs b/src/lib.rs index 5f21a94..15a21bc 100644 --- a/src/lib.rs +++ b/src/lib.rs @@ -289,39 +289,103 @@ impl<'a, A: ?Sized + UncheckedAnyExt, V: IntoBox> VacantEntry<'a, A, V> { } } -#[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); -#[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)); - } - }) + 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())); + )* + }) + } + ); + } + + // 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)]