Based on Linus' comment I changed your patch to just the following.
It still produced the 46M pack file, so the first hunk apears to
not have had much of an affect with this data.
>From a running time perspective it appears as though this patch is
making things slightly better, not worse. I ran it a few times
for each case always using the 46M pack as input for
"git-repack -a -d -f".
'next' 137.13 real 95.82 user 25.24 sys
'next'+patch 131.62 real 89.35 user 28.56 sys
but even if the running time was an extra 6 seconds I'd still rather
spend 4% more running time to use 1/2 the storage space.
diff --git a/pack-objects.c b/pack-objects.c
index 09f4f2c..f7d6217 100644
--- a/pack-objects.c
+++ b/pack-objects.c
@@ -1052,7 +1052,7 @@ static int try_delta(struct unpacked *cu
if (cur_entry->delta)
max_size = cur_entry->delta_size-1;
if (sizediff >= max_size)
- return -1;
+ return 0;
delta_buf = diff_delta(old->data, oldsize,
cur->data, size, &delta_size, max_size);
if (!delta_buf)
-
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