Re: [PATCH 1/3 v2] Add --blob-filter option to filter-branch.

Hi,

On Wed, 23 Apr 2008, Avery Pennarun wrote:

From: Jeff King <redacted>

This patch allows

  git filter-branch --blob-filter 'tr a-z A-Z'

However, it's _still_ horribly slow. Shell script is nice and flexible,
but running a tight loop like this is just painful. I suspect
filter-branch in something like perl would be a lot faster and just as
flexible.

It is still much better performance than a tree filter, though:

  $ cd git && time git filter-branch --tree-filter '
      find . -type f | while read f; do
        tr a-z A-Z <"$f" >tmp
        mv tmp "$f"
      done
    ' HEAD~10..HEAD

  real    4m38.626s
  user    1m32.726s
  sys     2m51.163s

  $ cd git && git filter-branch --blob-filter 'tr a-z A-Z' HEAD~10..HEAD
  real    1m40.809s
  user    0m36.822s
  sys     1m14.273s

Acked-by: Johannes Schindelin <redacted>
---

Thanks, I really appreciate it.

Ciao,
Dscho