Update design.md

design.md

@@ -83,14 +83,14 @@ The system implements a RESTful API with three core endpoints:
 #### Memory Allocation
 - **~1ns allocation time** vs standard allocators
 - **Bulk deallocation** eliminates individual free() calls
-- **Geometric growth** minimizes allocation frequency
+- **Optimized geometric growth** uses current block size for doubling strategy
 - **Alignment-aware** allocation prevents performance penalties
 
 #### JSON Parsing
 - **Streaming parser** handles large payloads efficiently
 - **Incremental processing** suitable for network protocols
 - **Arena storage** eliminates string allocation overhead
-- **Base64 decoding** integrated into parsing pipeline
+- **SIMD-accelerated base64 decoding** using simdutf for maximum performance
 
 ### Design Principles
 
@@ -112,11 +112,13 @@ The project includes comprehensive testing infrastructure:
 Build targets:
 - `test_arena_allocator`: Arena allocator functionality tests
 - `test_commit_request`: JSON parsing and validation tests
-- `bench_arena_allocator`: Performance benchmarking
+- `weaseldb`: Main application demonstrating configuration and parsing
+- Various benchmark executables for performance testing
 
 ### Dependencies
 
 - **weaseljson**: High-performance streaming JSON parser
+- **simdutf**: SIMD-accelerated UTF-8 validation and base64 encoding/decoding
 - **toml11**: TOML configuration file parsing
 - **doctest**: Lightweight testing framework
 - **nanobench**: Micro-benchmarking library