Start benchmarking

.github/workflows/ci.yml

@@ -186,9 +186,9 @@ jobs:
       # This changes a variable, so is only set when a custom SDK is used
       run: echo "SDKROOT=$HOME/extern/sdk" >> $GITHUB_ENV
 
-    - name: Install Clang
+    - name: Install Clang & Valgrind
       if: contains(matrix.os, 'ubuntu')
-      run: sudo apt-get -y install clang
+      run: sudo apt-get -y install clang valgrind
 
     - name: Install cross compilation tools
       if: matrix.target == 'i686-unknown-linux-gnu'
@@ -327,6 +327,15 @@ jobs:
         command: test
         args: --features ${{ env.FEATURES }} ${{ env.TESTARGS }} --release
 
+    - name: Run benchmarks
+      # Difficult to install Valgrind on macOS
+      # See https://github.com/LouisBrunner/valgrind-macos
+      if: contains(matrix.os, 'ubuntu')
+      uses: actions-rs/cargo@v1
+      with:
+        command: bench
+        args: --bench autorelease ${{ env.TESTARGS }}
+
     - name: Test with unstable features
       if: ${{ !matrix.dinghy && matrix.rust.toolchain == 'nightly' }}
       uses: actions-rs/cargo@v1

objc2/Cargo.toml

@@ -48,6 +48,13 @@ objc2-encode = { path = "../objc2-encode", version = "=2.0.0-beta.2" }
 [build-dependencies]
 cc = { version = "1", optional = true }
 
+[dev-dependencies]
+iai = { version = "0.1", git = "https://github.com/madsmtm/iai", branch = "callgrind" }
+
+[[bench]]
+name = "autorelease"
+harness = false
+
 [package.metadata.docs.rs]
 default-target = "x86_64-apple-darwin"
 

objc2/benches/autorelease.rs

@@ -0,0 +1,175 @@
+use core::ffi::c_void;
+use std::mem::ManuallyDrop;
+use std::ptr::NonNull;
+
+use objc2::ffi;
+use objc2::rc::{autoreleasepool, Id, Shared};
+use objc2::runtime::{Class, Object, Sel};
+use objc2::{class, msg_send, sel};
+
+#[cfg(apple)]
+#[link(name = "Foundation", kind = "framework")]
+extern "C" {}
+
+#[cfg(gnustep)]
+#[link(name = "gnustep-base", kind = "dylib")]
+extern "C" {}
+
+const BYTES: &[u8] = &[1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
+
+fn empty() {
+    #[cfg(gnustep)]
+    unsafe {
+        objc2::__gnustep_hack::get_class_to_force_linkage()
+    };
+}
+
+fn pool_cleanup() {
+    autoreleasepool(|_| {})
+}
+
+fn class() -> &'static Class {
+    class!(NSObject)
+}
+
+fn sel() -> Sel {
+    sel!(alloc)
+}
+
+fn send_message() -> &'static Class {
+    unsafe { msg_send![class!(NSObject), class] }
+}
+
+fn alloc_nsobject() -> *mut Object {
+    unsafe { msg_send![class!(NSObject), alloc] }
+}
+
+fn new_nsobject() -> Id<Object, Shared> {
+    let obj = alloc_nsobject();
+    let obj: *mut Object = unsafe { msg_send![obj, init] };
+    unsafe { Id::new(NonNull::new_unchecked(obj)) }
+}
+
+fn new_nsdata() -> Id<Object, Shared> {
+    let bytes_ptr = BYTES.as_ptr() as *const c_void;
+    let obj: *mut Object = unsafe { msg_send![class!(NSData), alloc] };
+    let obj: *mut Object = unsafe {
+        msg_send![
+            obj,
+            initWithBytes: bytes_ptr,
+            length: BYTES.len(),
+        ]
+    };
+    unsafe { Id::new(NonNull::new_unchecked(obj)) }
+}
+
+fn new_leaked_nsdata() -> *mut Object {
+    ManuallyDrop::new(new_nsdata()).as_ptr()
+}
+
+fn autoreleased_nsdata() -> *mut Object {
+    // let bytes_ptr = BYTES.as_ptr() as *const c_void;
+    // unsafe {
+    //     msg_send![
+    //         class!(NSData),
+    //         dataWithBytes: bytes_ptr,
+    //         length: BYTES.len(),
+    //     ]
+    // }
+    unsafe { msg_send![new_leaked_nsdata(), autorelease] }
+}
+
+fn new_nsstring() -> Id<Object, Shared> {
+    let obj: *mut Object = unsafe { msg_send![class!(NSString), alloc] };
+    let obj: *mut Object = unsafe { msg_send![obj, init] };
+    unsafe { Id::new(NonNull::new_unchecked(obj)) }
+}
+
+fn new_leaked_nsstring() -> *mut Object {
+    ManuallyDrop::new(new_nsstring()).as_ptr()
+}
+
+fn autoreleased_nsstring() -> *mut Object {
+    // unsafe { msg_send![class!(NSString), string] }
+    unsafe { msg_send![new_leaked_nsstring(), autorelease] }
+}
+
+fn retain_autoreleased(obj: *mut Object) -> Id<Object, Shared> {
+    let obj = unsafe { ffi::objc_retainAutoreleasedReturnValue(obj.cast()) };
+    unsafe { Id::new(NonNull::new_unchecked(obj).cast()) }
+}
+
+fn autoreleased_nsdata_pool_cleanup() -> *mut Object {
+    autoreleasepool(|_| autoreleased_nsdata())
+}
+
+fn autoreleased_nsdata_fast_caller_cleanup() -> Id<Object, Shared> {
+    retain_autoreleased(autoreleased_nsdata())
+}
+
+fn autoreleased_nsdata_fast_caller_cleanup_pool_cleanup() -> Id<Object, Shared> {
+    autoreleasepool(|_| retain_autoreleased(autoreleased_nsdata()))
+}
+
+fn autoreleased_nsstring_pool_cleanup() -> *mut Object {
+    autoreleasepool(|_| autoreleased_nsstring())
+}
+
+fn autoreleased_nsstring_fast_caller_cleanup() -> Id<Object, Shared> {
+    retain_autoreleased(autoreleased_nsstring())
+}
+
+fn autoreleased_nsstring_fast_caller_cleanup_pool_cleanup() -> Id<Object, Shared> {
+    autoreleasepool(|_| retain_autoreleased(autoreleased_nsstring()))
+}
+
+macro_rules! main_with_warmup {
+    ($($f:ident,)+) => {
+        mod warmup_fns {
+            $(
+                #[inline(never)]
+                pub fn $f() {
+                    let _ = iai::black_box(super::$f());
+                }
+            )+
+        }
+
+        fn warmup() {
+            $(
+                warmup_fns::$f();
+            )+
+        }
+
+        iai::main! {
+            warmup,
+            $(
+                $f,
+            )+
+        }
+    };
+}
+
+main_with_warmup! {
+    // Baseline
+    empty,
+    pool_cleanup,
+    class,
+    sel,
+    send_message,
+    alloc_nsobject,
+    new_nsobject,
+    // NSData
+    new_nsdata,
+    new_leaked_nsdata,
+    autoreleased_nsdata,
+    autoreleased_nsdata_pool_cleanup,
+    autoreleased_nsdata_fast_caller_cleanup,
+    autoreleased_nsdata_fast_caller_cleanup_pool_cleanup,
+    // NSString
+    new_nsstring,
+    new_leaked_nsstring,
+    autoreleased_nsstring,
+    autoreleased_nsstring_pool_cleanup,
+    autoreleased_nsstring_fast_caller_cleanup,
+    autoreleased_nsstring_fast_caller_cleanup_pool_cleanup,
+}

objc2/src/rc/autorelease.rs

@@ -45,6 +45,7 @@ impl AutoreleasePool {
     /// Additionally, the pools must be dropped in the same order they were
     /// created.
     #[doc(alias = "objc_autoreleasePoolPush")]
+    #[inline]
     unsafe fn new() -> Self {
         // TODO: Make this function pub when we're more certain of the API
         let context = unsafe { ffi::objc_autoreleasePoolPush() };
@@ -57,10 +58,7 @@ impl AutoreleasePool {
     }
 
     /// This will be removed in a future version.
-    #[cfg_attr(
-        not(all(debug_assertions, not(feature = "unstable_autoreleasesafe"))),
-        inline
-    )]
+    #[inline]
     #[doc(hidden)]
     pub fn __verify_is_inner(&self) {
         #[cfg(all(debug_assertions, not(feature = "unstable_autoreleasesafe")))]
@@ -139,6 +137,7 @@ impl Drop for AutoreleasePool {
     /// [clang documentation]: https://clang.llvm.org/docs/AutomaticReferenceCounting.html#autoreleasepool
     /// [revision `371`]: https://github.com/apple-oss-distributions/objc4/blob/objc4-371/runtime/objc-exception.m#L479-L482
     #[doc(alias = "objc_autoreleasePoolPop")]
+    #[inline]
     fn drop(&mut self) {
         unsafe { ffi::objc_autoreleasePoolPop(self.context) }
         #[cfg(all(debug_assertions, not(feature = "unstable_autoreleasesafe")))]
@@ -292,6 +291,7 @@ impl !AutoreleaseSafe for AutoreleasePool {}
 /// # panic!("Does not panic in release mode, so for testing we make it!");
 /// ```
 #[doc(alias = "@autoreleasepool")]
+#[inline(always)]
 pub fn autoreleasepool<T, F>(f: F) -> T
 where
     for<'p> F: FnOnce(&'p AutoreleasePool) -> T + AutoreleaseSafe,

objc2/src/rc/id.rs

@@ -237,7 +237,7 @@ impl<T: Message, O: Ownership> Id<T, O> {
     // let y: &T = &*retained;
     // ```
     #[doc(alias = "objc_retain")]
-    #[cfg_attr(not(debug_assertions), inline)]
+    #[inline]
     pub unsafe fn retain(ptr: NonNull<T>) -> Id<T, O> {
         let ptr = ptr.as_ptr() as *mut ffi::objc_object;
         // SAFETY: The caller upholds that the pointer is valid
@@ -266,7 +266,7 @@ impl<T: Message, O: Ownership> Id<T, O> {
         NonNull::new(ptr).map(|ptr| unsafe { Id::retain(ptr) })
     }
 
-    #[cfg_attr(not(debug_assertions), inline)]
+    #[inline]
     fn autorelease_inner(self) -> *mut T {
         // Note that this (and the actual `autorelease`) is not an associated
         // function. This breaks the guideline that smart pointers shouldn't

objc2/src/rc/id_traits.rs

@@ -65,6 +65,7 @@ pub trait DefaultId {
 }
 
 impl<T: DefaultId + ?Sized> Default for Id<T, T::Ownership> {
+    #[inline]
     fn default() -> Self {
         T::default_id()
     }

objc2/src/rc/weak_id.rs

@@ -4,7 +4,6 @@ use core::convert::TryFrom;
 use core::fmt;
 use core::marker::PhantomData;
 use core::ptr;
-use core::ptr::NonNull;
 use std::panic::{RefUnwindSafe, UnwindSafe};
 
 use super::{Id, Shared};
@@ -35,6 +34,7 @@ pub struct WeakId<T: ?Sized> {
 impl<T: Message> WeakId<T> {
     /// Construct a new [`WeakId`] referencing the given shared [`Id`].
     #[doc(alias = "objc_initWeak")]
+    #[inline]
     pub fn new(obj: &Id<T, Shared>) -> Self {
         // Note that taking `&Id<T, Owned>` would not be safe since that would
         // allow loading an `Id<T, Shared>` later on.
@@ -68,7 +68,7 @@ impl<T: Message> WeakId<T> {
     pub fn load(&self) -> Option<Id<T, Shared>> {
         let ptr: *mut *mut ffi::objc_object = self.inner.get() as _;
         let obj = unsafe { ffi::objc_loadWeakRetained(ptr) } as *mut T;
-        NonNull::new(obj).map(|obj| unsafe { Id::new(obj) })
+        unsafe { Id::new_null(obj) }
     }
 
     // TODO: Add `autorelease(&self) -> Option<&T>` using `objc_loadWeak`?
@@ -77,6 +77,7 @@ impl<T: Message> WeakId<T> {
 impl<T: ?Sized> Drop for WeakId<T> {
     /// Drops the `WeakId` pointer.
     #[doc(alias = "objc_destroyWeak")]
+    #[inline]
     fn drop(&mut self) {
         unsafe { ffi::objc_destroyWeak(self.inner.get() as _) }
     }
@@ -101,6 +102,7 @@ impl<T: Message> Default for WeakId<T> {
     /// Constructs a new `WeakId<T>` that doesn't reference any object.
     ///
     /// Calling [`Self::load`] on the return value always gives [`None`].
+    #[inline]
     fn default() -> Self {
         // SAFETY: The pointer is null
         unsafe { Self::new_inner(ptr::null_mut()) }
@@ -130,6 +132,7 @@ impl<T: RefUnwindSafe + ?Sized> RefUnwindSafe for WeakId<T> {}
 impl<T: RefUnwindSafe + ?Sized> UnwindSafe for WeakId<T> {}
 
 impl<T: Message> From<Id<T, Shared>> for WeakId<T> {
+    #[inline]
     fn from(obj: Id<T, Shared>) -> Self {
         WeakId::new(&obj)
     }