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authorJeff King <peff@peff.net>2007-03-11 02:39:17 (GMT)
committerShawn O. Pearce <spearce@spearce.org>2007-03-12 19:01:44 (GMT)
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fast-import: grow tree storage more aggressively
When building up a tree for a commit, fast-import dynamically allocates memory for the tree entries. When more space is needed, the allocated memory is increased by a constant amount. For very large trees, this means re-allocating and memcpy()ing the memory O(n) times. To compound this problem, releasing the previous tree resource does not free the memory; it is kept in a pool for future trees. This means that each of the O(n) allocations will consume increasing amounts of memory, giving O(n^2) memory consumption. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
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