On Tue, Jul 24, 2012 at 2:08 AM, Thomas Gummerer <t.gumme...@gmail.com> wrote:
> - We added a POC, for partial loading in git grep. This is still a
>   pretty hacky implementation, but it demonstrates pretty well
>   how much can be gained. Here are the timings Thomas posted on
>   IRC yesterday. The improvements of ls-files are not drastic
>   compared to index-v4, but git greps in subdirs benefit a lot
>   from partial loading.
>   Test                                      this tree
>   -----------------------------------------------------------
>   0002.2: v[23]: ls-files                   0.13(0.11+0.02)
>   0002.3: v[23]: grep nonexistent -- subdir 0.12(0.10+0.02)
>   0002.5: v4: ls-files                      0.11(0.09+0.01)
>   0002.6: v4: grep nonexistent -- subdir    0.10(0.08+0.02)
>   0002.8: v5: ls-files                      0.10(0.07+0.02)
>   0002.9: v5: grep nonexistent -- subdir    0.01(0.00+0.00)

Is ls-files improvement not drastic because you do not limit subdir
like grep? I see Thomas Rast put similar partial loading hack to
ls-files.c so I assume it can partial load too. Is partial loading
still fast with when a lot of unmerged entries are present?
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