On Wed, Apr 23, 2008 at 11:13:27AM +0100, Johannes Schindelin wrote: > > 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. > > 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 <johannes.schindelin@xxxxxx> I think it could use some documentation updates. Avery, do you want to try adding a CRLF example to the manpage? -Peff -- To unsubscribe from this list: send the line "unsubscribe git" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
