Hi Elijah,

On Thu, 29 Aug 2019, Elijah Newren wrote:

> fast-export and fast-import can easily handle the simple rewrite that
> was being done by filter-branch, and should be significantly faster on
> systems with a slow fork.  Timings from before and after on two laptops
> that I have access to (measured via `time ./t3427-rebase-subtree.sh`,
> i.e. including everything in this test -- not just the filter-branch or
> fast-export/fast-import pair):
>
>    Linux:  4.305s -> 3.684s (~17% speedup)
>    Mac:   10.128s -> 7.038s (~30% speedup)

This patch seems to accelerate t3427 on my Windows laptop, too, from
~1m37s to ~1m17s, i.e. ~20%.

Ciao,
Dscho

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