simple euristic for further free packing improvements

[git.git] / pack-objects.c

diff --git a/pack-objects.c b/pack-objects.c
index 5466b15..526c090 100644 (file)
--- a/pack-objects.c
+++ b/pack-objects.c
@@ -1039,8 +1039,8 @@ static int try_delta(struct unpacked *trg, struct unpacked *src,
 
        /* Now some size filtering euristics. */
        size = trg_entry->size;
-       max_size = size / 2 - 20;
-       if (trg_entry->delta)
+       max_size = (size/2 - 20) / (src_entry->depth + 1);
+       if (trg_entry->delta && trg_entry->delta_size <= max_size)
                max_size = trg_entry->delta_size-1;
        src_size = src_entry->size;
        sizediff = src_size < size ? size - src_size : 0;
@@ -1129,15 +1129,12 @@ static void find_deltas(struct object_entry **list, int window, int depth)
                        if (try_delta(n, m, m->index, depth) < 0)
                                break;
                }
-#if 0
                /* if we made n a delta, and if n is already at max
                 * depth, leaving it in the window is pointless.  we
                 * should evict it first.
-                * ... in theory only; somehow this makes things worse.
                 */
                if (entry->delta && depth <= entry->depth)
                        continue;
-#endif
                idx++;
                if (idx >= window)
                        idx = 0;