Simplifies the count_ones definition.

[fulmicoton]

BEFORE

test null_index::dense::bench::bench_translate_codec_to_orig_1percent_filled_0comma005percent_hit   ... bench:         108 ns/iter (+/- 0)
test null_index::dense::bench::bench_translate_codec_to_orig_1percent_filled_10percent_hit          ... bench:      40,972 ns/iter (+/- 1,481)
test null_index::dense::bench::bench_translate_codec_to_orig_1percent_filled_full_scan              ... bench:     295,988 ns/iter (+/- 4,140)
test null_index::dense::bench::bench_translate_codec_to_orig_90percent_filled_0comma005percent_hit  ... bench:      13,406 ns/iter (+/- 221)
test null_index::dense::bench::bench_translate_codec_to_orig_90percent_filled_full_scan             ... bench:  14,705,793 ns/iter (+/- 387,693)
test null_index::dense::bench::bench_translate_orig_to_codec_10percent_filled_1percent_hit          ... bench:     151,846 ns/iter (+/- 2,938)
test null_index::dense::bench::bench_translate_orig_to_codec_1percent_filled_10percent_hit          ... bench:     151,359 ns/iter (+/- 1,497)
test null_index::dense::bench::bench_translate_orig_to_codec_50percent_filled_1percent_hit          ... bench:     151,540 ns/iter (+/- 1,414)
test null_index::dense::bench::bench_translate_orig_to_codec_5percent_filled_10percent_hit          ... bench:     152,820 ns/iter (+/- 2,893)
test null_index::dense::bench::bench_translate_orig_to_codec_5percent_filled_1percent_hit           ... bench:       9,307 ns/iter (+/- 148)
test null_index::dense::bench::bench_translate_orig_to_codec_90percent_filled_1percent_hit          ... bench:     153,765 ns/iter (+/- 2,122)
test null_index::dense::bench::bench_translate_orig_to_codec_full_scan_10percent_filled             ... bench:   3,076,425 ns/iter (+/- 206,460)
test null_index::dense::bench::bench_translate_orig_to_codec_full_scan_1percent_filled              ... bench:   3,060,372 ns/iter (+/- 146,893)
test null_index::dense::bench::bench_translate_orig_to_codec_full_scan_90percent_filled             ... bench:   2,958,577 ns/iter (+/- 110,274)

AFTER

test null_index::dense::bench::bench_translate_codec_to_orig_1percent_filled_0comma005percent_hit   ... bench:         108 ns/iter (+/- 3)
test null_index::dense::bench::bench_translate_codec_to_orig_1percent_filled_10percent_hit          ... bench:      39,525 ns/iter (+/- 1,162)
test null_index::dense::bench::bench_translate_codec_to_orig_1percent_filled_full_scan              ... bench:     292,545 ns/iter (+/- 3,883)
test null_index::dense::bench::bench_translate_codec_to_orig_90percent_filled_0comma005percent_hit  ... bench:      13,389 ns/iter (+/- 316)
test null_index::dense::bench::bench_translate_codec_to_orig_90percent_filled_full_scan             ... bench:  14,979,334 ns/iter (+/- 394,784)
test null_index::dense::bench::bench_translate_orig_to_codec_10percent_filled_1percent_hit          ... bench:     136,520 ns/iter (+/- 6,735)
test null_index::dense::bench::bench_translate_orig_to_codec_1percent_filled_10percent_hit          ... bench:     125,931 ns/iter (+/- 2,445)
test null_index::dense::bench::bench_translate_orig_to_codec_50percent_filled_1percent_hit          ... bench:     177,007 ns/iter (+/- 8,229)
test null_index::dense::bench::bench_translate_orig_to_codec_5percent_filled_10percent_hit          ... bench:     135,014 ns/iter (+/- 7,003)
test null_index::dense::bench::bench_translate_orig_to_codec_5percent_filled_1percent_hit           ... bench:       6,821 ns/iter (+/- 145)
test null_index::dense::bench::bench_translate_orig_to_codec_90percent_filled_1percent_hit          ... bench:     158,235 ns/iter (+/- 2,165)
test null_index::dense::bench::bench_translate_orig_to_codec_full_scan_10percent_filled             ... bench:   1,920,218 ns/iter (+/- 22,984)
test null_index::dense::bench::bench_translate_orig_to_codec_full_scan_1percent_filled              ... bench:   1,254,135 ns/iter (+/- 93,152)
test null_index::dense::bench::bench_translate_orig_to_codec_full_scan_90percent_filled             ... bench:   3,128,615 ns/iter (+/- 96,084)

[codecov-commenter]

Codecov Report

Merging #1742 (2f49a87) into main (45156fd) will decrease coverage by 0.00%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #1742      +/-   ##
==========================================
- Coverage   94.13%   94.13%   -0.01%     
==========================================
  Files         267      267              
  Lines       50903    50900       -3     
==========================================
- Hits        47920    47913       -7     
- Misses       2983     2987       +4     

Impacted Files	Coverage Δ
fastfield_codecs/src/null_index/dense.rs	99.16% <100.00%> (-0.01%)	⬇️
src/fieldnorm/writer.rs	96.96% <0.00%> (-1.52%)	⬇️
src/fastfield/multivalued/mod.rs	97.29% <0.00%> (-1.16%)	⬇️
fastfield_codecs/src/null_index/sparse.rs	95.27% <0.00%> (-0.19%)	⬇️
stacker/src/expull.rs	98.88% <0.00%> (+0.55%)	⬆️

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