[Experimental] Add MemorySegment API support for zero-copy buffer I/O#2904
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[Experimental] Add MemorySegment API support for zero-copy buffer I/O#2904
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divang
commented
Mar 3, 2026
divang
commented
- Implement BufferAllocator interface with strategy pattern
- Add HeapBufferAllocator for traditional ByteBuffer (Java 8+)
- Add MemorySegmentBufferAllocator for zero-copy I/O (Java 22+)
- Update IOBuffer to use reflection-based factory for allocator selection
- Configure pom.xml for dual compilation (Java 8 + Java 22 targets)
- Add comprehensive performance comparison test suite
- System property: mssql.jdbc.useMemorySegment=true/false
- Implement BufferAllocator interface with strategy pattern - Add HeapBufferAllocator for traditional ByteBuffer (Java 8+) - Add MemorySegmentBufferAllocator for zero-copy I/O (Java 22+) - Update IOBuffer to use reflection-based factory for allocator selection - Configure pom.xml for dual compilation (Java 8 + Java 22 targets) - Add comprehensive performance comparison test suite - System property: mssql.jdbc.useMemorySegment=true/false
Codecov Report❌ Patch coverage is Additional details and impacted files@@ Coverage Diff @@
## main #2904 +/- ##
============================================
- Coverage 60.64% 60.39% -0.26%
+ Complexity 4913 4902 -11
============================================
Files 151 152 +1
Lines 34986 35134 +148
Branches 5849 5879 +30
============================================
Hits 21218 21218
- Misses 10927 11051 +124
- Partials 2841 2865 +24 ☔ View full report in Codecov by Sentry. 🚀 New features to boost your workflow:
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…ment-buffer-optimization
- Introduce BufferMode enum: HEAP, DIRECT_BUFFER, MEMORY_SEGMENT - Convert TDSPacket.payload from byte[] to ByteBuffer for zero-copy reads - Implement ByteBuffer.read() in TDSChannel for efficient I/O - Update TDSReader methods to use native ByteBuffer operations - Add automatic SSL-aware fallback (MEMORY_SEGMENT -> DIRECT_BUFFER) - Support legacy mssql.jdbc.useMemorySegment property
machavan
changed the title
- Implement HEAP, DIRECT_BUFFER, and MEMORY_SEGMENT buffer modes - Add SSLEngine support for zero-copy I/O with TLS - Validated performance gains: READ 26-43% faster, WRITE 13-36% faster for binary - Smart fallback: MEMORY_SEGMENT -> DIRECT_BUFFER when SSL active
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