Vulkan: Reserve memory for ResourceUseList::mResourceUses

ResourceUseList::add is called repeatedly when we need to track a resource's usage in a context. Instead of a potential memory operation on each add we reserve memory upfront for about 4k SharedResourceUse objects. If the vector grows larger, it will be automatically handled by std::vector's allocator. Bug: angleproject:4950 Change-Id: Ic85ed44a6662819621ee9a47f43dd2542b73114d Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2375801Reviewed-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Tim Van Patten <timvp@google.com> Commit-Queue: Mohan Maiya <m.maiya@samsung.com>

Vulkan: Reserve memory for ResourceUseList::mResourceUses
9a64f307 · Mohan Maiya · Commit Bot · a4f706b2 · 9a64f307
Commit 9a64f307 authored Aug 25, 2020 by Mohan Maiya Committed by Commit Bot Aug 26, 2020
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ResourceVk.cpp src/libANGLE/renderer/vulkan/ResourceVk.cpp +5 -1

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--- a/src/libANGLE/renderer/vulkan/ResourceVk.cpp
+++ b/src/libANGLE/renderer/vulkan/ResourceVk.cpp
@@ -96,7 +96,11 @@ bool SharedGarbage::destroyIfComplete(RendererVk *renderer, Serial completedSeri
 }

 // ResourceUseList implementation.
-ResourceUseList::ResourceUseList() = default;
+ResourceUseList::ResourceUseList()
+{
+    constexpr size_t kDefaultResourceUseCount = 4096;
+    mResourceUses.reserve(kDefaultResourceUseCount);
+}

 ResourceUseList::~ResourceUseList()
 {