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[PATCH 7/7] diff-tree: avoid lookup_unknown_object

From
Jeff King <peff@peff.net>
Date
Jul 11, 2014, 08:50 UTC
Message-ID
<20140711085041.GG5625@sigill.intra.peff.net>
In-Reply-To
<20140711084141.GA5521@sigill.intra.peff.net>

We generally want to avoid lookup_unknown_object, because it results in allocating more memory for the object than may be strictly necessary.

In this case, it is used to check whether we have an already-parsed object before calling parse_object, to save us from reading the object from disk. Using lookup_object would be fine for that purpose, but we can take it a step further. Since this code was written, parse_object already learned the "check lookup_object" optimization; we can simply call parse_object directly.

Signed-off-by: Jeff King <peff@peff.net>
---
 builtin/diff-tree.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/builtin/diff-tree.c b/builtin/diff-tree.c
index ce0e019..1c4ad62 100644
--- a/builtin/diff-tree.c
+++ b/builtin/diff-tree.c
@@ -68,9 +68,7 @@ static int diff_tree_stdin(char *line)
 	line[len-1] = 0;
 	if (get_sha1_hex(line, sha1))
 		return -1;
-	obj = lookup_unknown_object(sha1);
-	if (!obj || !obj->parsed)
-		obj = parse_object(sha1);
+	obj = parse_object(sha1);
 	if (!obj)
 		return -1;
 	if (obj->type == OBJ_COMMIT)
-- 
2.0.0.566.gfe3e6b2
Previous: Jeff KingNext: Ramsay Jones
Message 34 of 35 in “alloc.c: remove the redundant commit_count variable”
  1. 2/2 alloc.c: remove the redundant commit_count variableRamsay Jones, Jul 10, 2014
  2. Jeff KingJul 11, 2014
  3. Ramsay JonesJul 11, 2014
  4. Jeff KingJul 11, 2014
  5. Ramsay JonesJul 11, 2014
  6. 0/7 ensure index is set for all OBJ_COMMIT objects variableJeff King, Jul 11, 2014
  7. 1/7 alloc.c: remove the alloc_raw_commit_node() functionJeff King, Jul 11, 2014
  8. 2/7 move setting of object->type to alloc_* functionsJeff King, Jul 11, 2014
  9. Ramsay JonesJul 12, 2014
  10. Jeff KingJul 12, 2014
  11. Jeff KingJul 13, 2014
  12. 1/8 alloc.c: remove the alloc_raw_commit_node() functionJeff King, Jul 13, 2014
  13. Junio C HamanoJul 15, 2014
  14. 2/8 alloc: write out allocator definitionsJeff King, Jul 13, 2014
  15. Junio C HamanoJul 15, 2014
  16. 3/8 move setting of object->type to alloc_* functionsJeff King, Jul 13, 2014
  17. Junio C HamanoJul 15, 2014
  18. 4/8 parse_object_buffer: do not set object typeJeff King, Jul 13, 2014
  19. 5/8 add object_as_type helper for casting objectsJeff King, Jul 13, 2014
  20. 6/8 alloc: factor out commit indexJeff King, Jul 13, 2014
  21. 7/8 object_as_type: set commit indexJeff King, Jul 13, 2014
  22. 8/8 diff-tree: avoid lookup_unknown_objectJeff King, Jul 13, 2014
  23. Ramsay JonesJul 13, 2014
  24. Jeff KingJul 14, 2014
  25. Ramsay JonesJul 14, 2014
  26. Ramsay JonesJul 12, 2014
  27. Jeff KingJul 12, 2014
  28. 3/7 parse_object_buffer: do not set object typeJeff King, Jul 11, 2014
  29. 4/7 add object_as_type helper for casting objectsJeff King, Jul 11, 2014
  30. Ramsay JonesJul 11, 2014
  31. Jeff KingJul 11, 2014
  32. 5/7 alloc: factor out commit indexJeff King, Jul 11, 2014
  33. 6/7 object_as_type: set commit indexJeff King, Jul 11, 2014
  34. 7/7 diff-tree: avoid lookup_unknown_objectJeff King, Jul 11, 2014
  35. Ramsay JonesJul 11, 2014

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