Introduce zero-allocation row extraction and query result buffers across `obicompactvec` and `obikpartitionner` to eliminate per-kmer heap allocations. Replace in-memory MPHF deserialization with memory-mapped, zero-copy views to reduce runtime memory footprint. Add configurable I/O chunking, a RAM-aware `--chunk-size` parameter, and system memory monitoring via the new `sysinfo` dependency. Re-export `PreloadedIndex` for external consumers.
Establishes the `obisys` crate using Rust 2024 and the `libc` dependency. Introduces a lightweight profiler that captures wall-clock time and `getrusage` system metrics per pipeline stage. Automatically computes parallelism and efficiency ratios, detects bottlenecks such as memory pressure and disk I/O, and prints a formatted diagnostic summary to stderr.
Eric Coissac