From c4717cc9d15d30e08f03f51845c950175979bcc4 Mon Sep 17 00:00:00 2001 From: Nicholas Nethercote Date: Thu, 8 Aug 2024 17:18:20 +1000 Subject: Shrink `TyKind::FnPtr`. By splitting the `FnSig` within `TyKind::FnPtr` into `FnSigTys` and `FnHeader`, which can be packed more efficiently. This reduces the size of the hot `TyKind` type from 32 bytes to 24 bytes on 64-bit platforms. This reduces peak memory usage by a few percent on some benchmarks. It also reduces cache misses and page faults similarly, though this doesn't translate to clear cycles or wall-time improvements on CI. --- compiler/rustc_ty_utils/src/instance.rs | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'compiler/rustc_ty_utils/src/instance.rs') diff --git a/compiler/rustc_ty_utils/src/instance.rs b/compiler/rustc_ty_utils/src/instance.rs index 43e49138709..c7ed6e6110f 100644 --- a/compiler/rustc_ty_utils/src/instance.rs +++ b/compiler/rustc_ty_utils/src/instance.rs @@ -248,7 +248,7 @@ fn resolve_associated_item<'tcx>( if name == sym::clone { let self_ty = trait_ref.self_ty(); match self_ty.kind() { - ty::FnDef(..) | ty::FnPtr(_) => (), + ty::FnDef(..) | ty::FnPtr(..) => (), ty::Coroutine(..) | ty::CoroutineWitness(..) | ty::Closure(..) -- cgit 1.4.1-3-g733a5