Re: Git on Windows, CRLF issues

On Wed, Apr 23, 2008 at 11:13:27AM +0100, Johannes Schindelin wrote:

quoted

It was easy enough to work up the patch below, which allows

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

However, it's _still_ horribly slow.

You create a quite huge blob-cache, so you are pretty heavy on disk-I/O.  
Have you tried (as suggested in the man page) to run this on a huge RAM 
disk?  That should blow you away.

No, I didn't. But the disk I/O is pretty minimal. The blob cache is only
a few megabytes, and it stays entirely in Linux's disk cache. My disk
light only blinks every 5-10 seconds to flush dirty pages to disk.

I hoped that the rewrite-commits attempt was more than just that: an 
attempt.  So there is a point you could start from, doing things in C.

But I doubt that you get any joy: either your language is too limited, or 
you will get the same problems (fork() overhead) again.

Ah, right. I totally forgot about that effort. I will take a peek next
time I need to do some filtering.

quoted

Anyway, here is the patch. I don't know if it is even worth applying, 
since it is still painfully slow.

I like your patch:

Acked-by: Johannes Schindelin <redacted>

I think it could use some documentation updates. Avery, do you want to
try adding a CRLF example to the manpage?

-Peff