Porting Go's strings package to C
6 hours ago
- #memory management
- #Go to C porting
- #performance optimization
- The author ported Go's standard library to C, starting with the io, bytes, and strings packages to extend functionality.
- Key dependencies like math/bits and unicode/utf8 were ported first, addressing differences in bit shift precedence between Go and C by using parentheses.
- Pure functions such as Equal and IndexByte were straightforward to port, leveraging C's memcmp and memchr for optimization, while allocators were introduced for memory management to mimic Go's behavior without a garbage collector.
- Types like bytes.Buffer and strings.Builder were ported with allocator fields to handle memory allocation explicitly, though C code became more verbose.
- Benchmarks showed the C versions generally outperformed Go, except for Index and IndexByte, where Go's assembly optimizations provided an edge.
- Optimizing strings.Builder revealed that inlining WriteString calls in C, rather than return type issues, was key to achieving 2-4x speed improvements over Go.