comparison mercurial/configitems.py @ 47254:eac3591abbf4

revlog: add a `_get_decompressor` method

This logic is non-trivial and we will need to reuse it.

Differential Revision: https://phab.mercurial-scm.org/D10651

47253:b876f0bf7366

#   keeping references to the affected revlogs, especially memory-wise when
#   rewriting sidedata.
# * sidedata compression
# * introduce a proper solution to reduce the number of filelog related files.
# * Improvement to consider
#   - track compression mode in the index entris instead of the chunks
#   - 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(

47254:eac3591abbf4

#   keeping references to the affected revlogs, especially memory-wise when
#   rewriting sidedata.
# * sidedata compression
# * introduce a proper solution to reduce the number of filelog related files.
# * 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(