osobhandClaude Opus 5.5
d2b25f154f
read_exact_at and read_upto (and so Window::read) ask as_contiguous() first and slice the file directly when the backend holds it in memory: one dynamic call per structure read instead of two or three (len, read_at, then len again for errors). Same results and errors. Provisional (busy machine, not for docs): a listing that walks 400 symbol-table groups through the facade went from about 18% to about 14% slower than before the Storage conversion; the extra cost is a few tens of nanoseconds per structure read, which the facade's per-lookup re-listing (range-reads.md M0) multiplies. Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>
clawhdf5-format
Pure-Rust HDF5 binary format parsing and writing — no C dependencies.
Features
- Zero-copy superblock, object header, and B-tree parsing
- Chunked dataset read/write with filter pipelines
no_stdsupport (disablestdfeature)- Optional parallel reads via Rayon
- SHA-256 provenance tracking
Usage
use clawhdf5_format::Superblock;
let data = std::fs::read("data.h5").unwrap();
let sb = Superblock::from_bytes(&data).unwrap();
println!("HDF5 version {}.{}", sb.version_major(), sb.version_minor());
License
MIT