diff options
| author | Jacques Lucke <jacques@blender.org> | 2022-05-25 17:28:07 +0300 |
|---|---|---|
| committer | Jacques Lucke <jacques@blender.org> | 2022-05-25 17:28:07 +0300 |
| commit | a337e7738fbf2ec1eaec4c1deb46d28840885758 (patch) | |
| tree | b7b3d436363d8ab07c9fbfa0067233c1c604b652 /source/blender/blenlib/BLI_array.hh | |
| parent | f381c31ac69cb8a6175a54dc31863e13e9b199d6 (diff) | |
BLI: use no_unique_address attribute
Even though the `no_unique_address` attribute has only been standardized
in C++20, compilers seem to support it with C++17 already. This attribute
allows reducing the memory footprint of structs which have empty types as
data members (usually that is an allocator or inline buffer in Blender).
Previously, one had to use the empty base optimization to achieve the same
effect, which requires a lot of boilerplate code.
The types that benefit from this the most are `Vector` and `Array`, which
usually become 8 bytes smaller. All types which use these core data structures
get smaller as well of course.
Differential Revision: https://developer.blender.org/D14993
Diffstat (limited to 'source/blender/blenlib/BLI_array.hh')
| -rw-r--r-- | source/blender/blenlib/BLI_array.hh | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/source/blender/blenlib/BLI_array.hh b/source/blender/blenlib/BLI_array.hh index 91dfc81ae27..813277d9968 100644 --- a/source/blender/blenlib/BLI_array.hh +++ b/source/blender/blenlib/BLI_array.hh @@ -64,10 +64,10 @@ class Array { int64_t size_; /** Used for allocations when the inline buffer is too small. */ - Allocator allocator_; + BLI_NO_UNIQUE_ADDRESS Allocator allocator_; /** A placeholder buffer that will remain uninitialized until it is used. */ - TypedBuffer<T, InlineBufferCapacity> inline_buffer_; + BLI_NO_UNIQUE_ADDRESS TypedBuffer<T, InlineBufferCapacity> inline_buffer_; public: /** |