fast-import keeps a struct object_entry for each object written to
it's pack. This is to keep type, pack-coordinates and delta_depth.
struct object_entry is also used to cache this metadata for objects
that exist outside fast-import's pack ('old' objects).
struct object_entry has a small fixed size and thus it should be
reasonable to cache any 'old' object metadata retrieval to save the
disk i/o.
Also it is a step toward making fast-import identify objects via
struct object_entry rather than sha1. One pointer takes less than
20 bytes, it'll be later possible to have references to objects
that don't yet have sha1 computed (fast-import with threads future).
Dmitry Ivankov (8):
fast-import: cache oe in file_change_m
fast-import: cache oe in parse_new_tag
fast-import: cache oe in note_change_n
fast-import: extract common sha1_file access functions
fast-import: tiny optimization in read_marks
fast-import: cache oe in load_tree
fast-import: cache oe in cat_blob
fast-import: cache objects while dereferencing
fast-import.c | 177 +++++++++++++++++++++++++++++++--------------------------
1 files changed, 96 insertions(+), 81 deletions(-)
--
1.7.3.4
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