OXYGENHUB

The full Linux run in the benchmarks 75b6c8665219

refs #35
Author
Andy McCall @andymccall <[email protected]>
When
· 2026-09-30 05:36 UTC
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✔ signed by Andy McCall
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75b6c86652194ec742e110d942105569180a3c09bc69b8f0cc3840e656ba9df1
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    - list a commit's changes with `git diff-tree` against its first parent rather than `ls-tree`;
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    - keep the tree view up to date as changes apply, rather than recomputing it;
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    - render only the paths a commit touches.
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- 2026-09-30 **Full Linux run** (06:24): table in `docs/benchmarks.md`. oxy matches Git on the first commit (38.5 s against 38.8 s) and beats it on gc (39.7 s against 102.8 s); the store is 324 MB against 295 MB. Everyday commands are still 5 to 15 times slower: most of each is loading the base's history and tree view. A one-file commit no longer reloads the new base for its manifest keys: 3.1 s (from 4.7 s). oxygen#41 (a base index) is proposed and waits for Andy.

    

  
  

  





  
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references pass 1.7 s. Phases are timed (`OXY_TIMINGS`): objects 5.1 s,

    

  
    

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references 1.7 s, states and checkpoints 10.4 s.

    

  
    

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### The full run (2026-09-30 06:24, main-0ba9b2e4)

    

  
    

      
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`~/bench/linux-bench.sh` on Earth, at load average 3.8 to 4.5 (flow jobs

    

  
    

      
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were running). Times are wall clock; memory is peak resident size.

    

  
    

      
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| Operation | oxy | Git |

    

  
    

      
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|---|---:|---:|

    

  
    

      
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| init and commit the tip | 38.50 s, 4.4 GB | 38.77 s, 42 MB |

    

  
    

      
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| status, clean (three runs) | 0.68 to 0.76 s, 123 MB | 0.35 to 0.76 s, 31 MB |

    

  
    

      
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| status, one file | 3.32 s, 641 MB | 0.59 s |

    

  
    

      
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| diff, one file | 2.93 s | 0.24 s |

    

  
    

      
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| commit, one file | 4.74 s, 752 MB | 0.45 s |

    

  
    

      
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| status, 1 000 files | 3.88 s, 811 MB | 0.41 s |

    

  
    

      
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| diff, 1 000 files | 2.83 s | 0.95 s |

    

  
    

      
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| commit, 1 000 files | 4.85 s, 922 MB | 0.57 s |

    

  
    

      
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| log -n 100 | 1.39 s, 291 MB | 0.01 s |

    

  
    

      
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| blame MAINTAINERS | 1.18 s, 335 MB | 0.09 s |

    

  
    

      
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| checkout the first state (run by hand) | 2.84 s | 0.42 s |

    

  
    

      
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| checkout back | 2.22 to 2.72 s, 491 MB | 0.47 s |

    

  
    

      
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| fsck | 22.10 s, 1.07 GB | 13.09 s |

    

  
    

      
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| gc | 39.66 s, 2.8 GB | 102.79 s |

    

  
    

      
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| store before gc | 414 MB | 648 MB |

    

  
    

      
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| store after gc | 324 MB | 295 MB |

    

  
    

      
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The script's own oxy checkout of the first state failed; its hash lacked

    

  
    

      
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the `#`, and the script is fixed. The time in the table is from running

    

  
    

      
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it by hand.

    

  
    

      
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Commit, one file: its graph keys now come from the state the commit

    

  
    

      
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extended rather than a reload of the new base (main-eff93613), which

    

  
    

      
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takes it to 3.05 to 3.27 s; the status after it takes 0.43 s.

    

  
    

      
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What is left for the everyday commands is mostly loading the base's

    

  
    

      
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history and its tree view (about 1 s of each) and rendering what

    

  
    

      
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changed. oxygen#41 proposes a base index that would make those reads

    

  
    

      
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proportional to what changed.