Persistent store with Git semantics: lazy reads, delayed writes, content-addressing

Document chart generation in README

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

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bench/README.md
··· 53 53 | `backend_lavyek.ml` | Lavyek adapter to `Backend.t` | 54 54 | `bench_irmin4_main.ml` | CLI runner for all irmini backends | 55 55 | `run.sh` | Full comparison script (irmini + Irmin) | 56 + | `gen_chart.py` | Generate `bench_chart.svg` from results | 56 57 57 58 ## Results 58 59 ··· 62 63 ### Overview 63 64 64 65 ![Benchmark comparison](bench_chart.svg) 66 + 67 + To regenerate the chart after updating the data in `gen_chart.py`: 68 + 69 + ``` 70 + python3 bench/gen_chart.py 71 + ``` 65 72 66 73 ### Irmini (memory, disk, lavyek) 67 74