Re: Problem with large files on different OSes

> Something like the following may also work, as a more generic "just don't 
> even bother trying to delta huge files".
> 
> Totally untested. Maybe it works. Maybe it doesn't.
> 
> 		Linus
> 
> ---
>  Documentation/config.txt |    7 +++++++
>  builtin-pack-objects.c   |    9 +++++++++
>  2 files changed, 16 insertions(+), 0 deletions(-)
> 
> diff --git a/Documentation/config.txt b/Documentation/config.txt
> index 2c03162..8c21027 100644
> --- a/Documentation/config.txt
> +++ b/Documentation/config.txt
> @@ -1238,6 +1238,13 @@ older version of git. If the `{asterisk}.pack` file is smaller than 2 GB, howeve
>  you can use linkgit:git-index-pack[1] on the *.pack file to regenerate
>  the `{asterisk}.idx` file.
>  
> +pack.packDeltaLimit::
> +	The default maximum size of objects that we try to delta.

> diff --git a/builtin-pack-objects.c b/builtin-pack-objects.c
> index 9742b45..9a0072b 100644
> --- a/builtin-pack-objects.c
> +++ b/builtin-pack-objects.c
> @@ -85,6 +85,7 @@ static struct progress *progress_state;
>  static int pack_compression_level = Z_DEFAULT_COMPRESSION;
>  static int pack_compression_seen;
>  
> +static unsigned long pack_delta_limit = 64*1024*1024;
>  static unsigned long delta_cache_size = 0;
>  static unsigned long max_delta_cache_size = 0;
>  static unsigned long cache_max_small_delta_size = 1000;
> @@ -1270,6 +1271,10 @@ static int try_delta(struct unpacked *trg, struct unpacked *src,
>  	if (trg_entry->type != src_entry->type)
>  		return -1;
>  
> +	/* If we limit delta generation, don't even bother for larger blobs */
> +	if (pack_delta_limit && trg_entry->size >= pack_delta_limit)
> +		return -1;