Comment 9 for bug 829298
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| William Grant (wgrant) wrote Re: bzr-git performance suffers for large repositories | #9 |
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A significant part of the slowness (but not the space-inefficiency) is that blobs only enter the idmap when there's a content_changed event. If an InventoryFile shows up with a new revision but without new content, it can cause the file to be rehashed in every subsequent commit until the content actually changes.
Hacking the fallback in _tree_to_objects to forcibly cache any misses makes things several times faster on long complex histories.