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AK: Give DisjointChunks::m_chunks an inline capacity of 1

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That's one fewer level of indirection for flattened ones.
This commit is contained in:
Ali Mohammad Pur 2022-11-16 01:22:34 +03:30 committed by Ali Mohammad Pur
parent e9b9527440
commit c2b20b5681
Notes: sideshowbarker 2024-07-17 04:23:40 +09:00 
Author: https://github.com/alimpfard
Commit: https://github.com/SerenityOS/serenity/commit/c2b20b5681
Pull-request: https://github.com/SerenityOS/serenity/pull/15994
1 changed files with 10 additions and 7 deletions
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17
AK/DisjointChunks.h
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@ -15,11 +15,11 @@
namespace AK {
template<typename ChunkType, bool IsConst>
template<typename ChunkType, bool IsConst, size_t InlineCapacity = 0>
struct DisjointIterator {
struct EndTag {
};
using ReferenceType = Conditional<IsConst, AddConst<Vector<ChunkType>>, Vector<ChunkType>>&;
using ReferenceType = Conditional<IsConst, AddConst<Vector<ChunkType, InlineCapacity>>, Vector<ChunkType, InlineCapacity>>&;
DisjointIterator(ReferenceType chunks)
: m_chunks(chunks)
@ -232,6 +232,9 @@ FixedArray<T> shatter_chunk(FixedArray<T>& source_chunk, size_t start, size_t sl
template<typename T, typename ChunkType = Vector<T>>
class DisjointChunks {
private:
constexpr static auto InlineCapacity = IsCopyConstructible<ChunkType> ? 1 : 0;
public:
DisjointChunks() = default;
~DisjointChunks() = default;
@ -397,10 +400,10 @@ public:
m_chunks.remove(1, m_chunks.size() - 1);
}
DisjointIterator<ChunkType, false> begin() { return { m_chunks }; }
DisjointIterator<ChunkType, false> end() { return { m_chunks, {} }; }
DisjointIterator<ChunkType, true> begin() const { return { m_chunks }; }
DisjointIterator<ChunkType, true> end() const { return { m_chunks, {} }; }
DisjointIterator<ChunkType, false, InlineCapacity> begin() { return { m_chunks }; }
DisjointIterator<ChunkType, false, InlineCapacity> end() { return { m_chunks, {} }; }
DisjointIterator<ChunkType, true, InlineCapacity> begin() const { return { m_chunks }; }
DisjointIterator<ChunkType, true, InlineCapacity> end() const { return { m_chunks, {} }; }
private:
struct ChunkAndOffset {
@ -428,7 +431,7 @@ private:
return { &m_chunks.last(), index - (offset - m_chunks.last().size()) };
}
Vector<ChunkType> m_chunks;
Vector<ChunkType, InlineCapacity> m_chunks;
};
}