Improved parquet read benches

[jorgecarleitao]

• Fixed a "factor by 8" error in reporting results: the results in https://docs.google.com/spreadsheets/d/12Sj1kjhadT-l0KXirexQDOocsLg-M4Ao1jnqXstCpx0/edit#gid=1919295045 were being reported as e.g. N=2^20, when in fact they were N=2^23 (for all cases considered). This is now fixed.
• Added Python scripts to reproduce the exact values that reported on the sheet above, for transparency and reproducibility
• Added benches for compressed columns and multiple pages

[codecov]

Codecov Report

Merging #533 (c08e54c) into main (47a632c) will decrease coverage by 0.02%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main     #533      +/-   ##
==========================================
- Coverage   80.20%   80.17%   -0.03%     
==========================================
  Files         381      381              
  Lines       23744    23784      +40     
==========================================
+ Hits        19044    19070      +26     
- Misses       4700     4714      +14     

Impacted Files	Coverage Δ
src/io/parquet/write/mod.rs	63.82% <0.00%> (-1.82%)	⬇️
src/io/ipc/write/common.rs	76.28% <0.00%> (+0.64%)	⬆️
src/io/avro/read/schema.rs	55.95% <0.00%> (+1.19%)	⬆️
src/bitmap/utils/slice_iterator.rs	94.02% <0.00%> (+1.49%)	⬆️
src/compute/arithmetics/time.rs	46.93% <0.00%> (+2.04%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 47a632c...c08e54c. Read the comment docs.