comparison mercurial/configitems.py @ 47389:e6292eb33384

revlog: store sidedata in their own file

This makes sidedata manipulation simpler and results in more compact data when
traversing either data or sidedata.

Differential Revision: https://phab.mercurial-scm.org/D10787

47388:bcf92bdc2bca

# * Exchange-wise, we will also need to do something more efficient than
#   keeping references to the affected revlogs, especially memory-wise when
#   rewriting sidedata.
# * introduce a proper solution to reduce the number of filelog related files.
# * use caching for reading sidedata (similar to what we do for data).
# * Improvement to consider
#   - avoid compression header in chunk using the default compression?
#   - forbid "inline" compression mode entirely?
#   - split the data offset and flag field (the 2 bytes save are mostly trouble)
#   - keep track of uncompressed -chunk- size (to preallocate memory better)
#   - keep track of chain base or size (probably not that useful anymore)
#   - store data and sidedata in different files
coreconfigitem(
    b'experimental',
    b'revlogv2',
    default=None,
)

47389:e6292eb33384

# * Exchange-wise, we will also need to do something more efficient than
#   keeping references to the affected revlogs, especially memory-wise when
#   rewriting sidedata.
# * introduce a proper solution to reduce the number of filelog related files.
# * use caching for reading sidedata (similar to what we do for data).
# * no longer set offset=0 if sidedata_size=0 (simplify cutoff computation).
# * Improvement to consider
#   - avoid compression header in chunk using the default compression?
#   - forbid "inline" compression mode entirely?
#   - split the data offset and flag field (the 2 bytes save are mostly trouble)
#   - keep track of uncompressed -chunk- size (to preallocate memory better)
#   - keep track of chain base or size (probably not that useful anymore)
coreconfigitem(
    b'experimental',
    b'revlogv2',
    default=None,
)