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perf: Optimize non-prefix key strategies and

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memory usage

- Conditionally allocate prefix buffers in `LeafNode` and introduce `PrefixInternalNode` to reduce memory overhead when prefixes are disabled.
- Bypass prefix calculation and logic entirely when `UsesPrefixes` is false.
- Add a binary search fallback for key scanning.
- Implement a dedicated `int` scanning fast-path, removing SIMD prefix usage from `IntStrategy`.
- Reorganize key strategies into separate files.
- Add a new benchmark project specifically for string keys.
This commit is contained in:
Linus Björnstam 2026-04-22 15:55:33 +02:00
parent 570a736606
commit 9242c1c751
13 changed files with 1297 additions and 677 deletions
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7
NiceBtree.sln
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@ -12,6 +12,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "AgainstImmutableDict", "ben
EndProject
Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "AgainstLanguageExt", "benchmarks\AgainstLanguageExt\AgainstLanguageExt.csproj", "{6C16526B-5139-4EA3-BF74-E6320F467198}"
EndProject
Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "MyBenchMarks", "benchmarks\MyBenchMarks\MyBenchMarks.csproj", "{769E1CEA-7E01-405B-80A2-95CBF432A2BA}"
EndProject
Global
GlobalSection(SolutionConfigurationPlatforms) = preSolution
Debug|Any CPU = Debug|Any CPU
@ -21,6 +23,7 @@ Global
{CA49AA3C-0CE6-4735-887F-FB3631D63CEE} = {B0432C7A-80E2-4EA6-8FAB-B8F23A8C39DE}
{13304F19-7ED3-4C40-9A08-46D539667D50} = {E38B3FCB-0D4D-401D-A2FC-EDF41B755E53}
{6C16526B-5139-4EA3-BF74-E6320F467198} = {E38B3FCB-0D4D-401D-A2FC-EDF41B755E53}
{769E1CEA-7E01-405B-80A2-95CBF432A2BA} = {E38B3FCB-0D4D-401D-A2FC-EDF41B755E53}
EndGlobalSection
GlobalSection(ProjectConfigurationPlatforms) = postSolution
{CA49AA3C-0CE6-4735-887F-FB3631D63CEE}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
@ -39,5 +42,9 @@ Global
{6C16526B-5139-4EA3-BF74-E6320F467198}.Debug|Any CPU.Build.0 = Debug|Any CPU
{6C16526B-5139-4EA3-BF74-E6320F467198}.Release|Any CPU.ActiveCfg = Release|Any CPU
{6C16526B-5139-4EA3-BF74-E6320F467198}.Release|Any CPU.Build.0 = Release|Any CPU
{769E1CEA-7E01-405B-80A2-95CBF432A2BA}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
{769E1CEA-7E01-405B-80A2-95CBF432A2BA}.Debug|Any CPU.Build.0 = Debug|Any CPU
{769E1CEA-7E01-405B-80A2-95CBF432A2BA}.Release|Any CPU.ActiveCfg = Release|Any CPU
{769E1CEA-7E01-405B-80A2-95CBF432A2BA}.Release|Any CPU.Build.0 = Release|Any CPU
EndGlobalSection
EndGlobal