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Bulk decompression: compute bitmap prefix sums #5914

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@akuzm akuzm commented Aug 1, 2023

Prefix sums are more useful for Gorilla decompression, and allow us to simplify the algorithms and get a small performance boost.

They are more useful for Gorilla decompression and for nulls handling,
and allow us to simplify the algorithms and have a small performance
boost.
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codecov bot commented Aug 1, 2023

Codecov Report

Merging #5914 (6660468) into main (0d127f6) will decrease coverage by 0.23%.
The diff coverage is 89.10%.

@@            Coverage Diff             @@
##             main    #5914      +/-   ##
==========================================
- Coverage   87.15%   86.93%   -0.23%     
==========================================
  Files         243      244       +1     
  Lines       55550    55813     +263     
  Branches    12269    12356      +87     
==========================================
+ Hits        48417    48520     +103     
- Misses       4837     4930      +93     
- Partials     2296     2363      +67     
Files Changed Coverage Δ
tsl/src/compression/gorilla.c 87.07% <ø> (ø)
tsl/src/compression/simple8b_rle_prefix_sum.h 84.61% <84.61%> (ø)
tsl/src/compression/gorilla_impl.c 97.33% <93.33%> (-0.07%) ⬇️
tsl/src/compression/deltadelta_impl.c 100.00% <100.00%> (ø)
tsl/src/compression/simple8b_rle_bitmap.h 88.57% <100.00%> (+0.16%) ⬆️
tsl/src/compression/simple8b_rle_decompress_all.h 91.66% <100.00%> (ø)

... and 37 files with indirect coverage changes

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