Skip to content
  • Kyle Lippincott's avatar
    branchmap: add a cache validation cache, avoid expensive re-hash on every use · 89f0d9f87701
    Kyle Lippincott authored
    In a pathological `hg log` case, we end up executing the branchmap validity
    checking twice per commit displayed. Or maybe we always do, and I just noticed
    because it's really slow in this repo for some reason.
    
    Before:
    ```
      Time (mean ± σ):      9.816 s ±  0.071 s    [User: 9.435 s, System: 0.392 s]
    
      Range (min … max):    9.709 s …  9.920 s
    ```
    
    After:
    ```
      Time (mean ± σ):      8.671 s ±  0.078 s    [User: 8.309 s, System: 0.392 s]
    
      Range (min … max):    8.594 s …  8.816 s
    ```
    
    Differential Revision: https://phab.mercurial-scm.org/D9023
    89f0d9f87701