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203751f2fe
* Optimize ExistsQuery for a high number of dynamic columns The previous algorithm checked _each_ doc in _each_ column for existence. This causes huge cost on JSON fields with e.g. 100k columns. Compute a bitset instead if we have more than one column. add `iter_docs` to the multivalued_index * add benchmark subfields=1 exists_json_union Memory: 89.3 KB (+2.01%) Avg: 0.4865ms (-26.03%) Median: 0.4865ms (-26.03%) [0.4865ms .. 0.4865ms] subfields=2 exists_json_union Memory: 68.1 KB Avg: 1.7048ms (-0.46%) Median: 1.7048ms (-0.46%) [1.7048ms .. 1.7048ms] subfields=3 exists_json_union Memory: 61.8 KB Avg: 2.0742ms (-2.22%) Median: 2.0742ms (-2.22%) [2.0742ms .. 2.0742ms] subfields=4 exists_json_union Memory: 119.8 KB (+103.44%) Avg: 3.9500ms (+42.62%) Median: 3.9500ms (+42.62%) [3.9500ms .. 3.9500ms] subfields=5 exists_json_union Memory: 120.4 KB (+107.65%) Avg: 3.9610ms (+20.65%) Median: 3.9610ms (+20.65%) [3.9610ms .. 3.9610ms] subfields=6 exists_json_union Memory: 120.6 KB (+107.49%) Avg: 3.8903ms (+3.11%) Median: 3.8903ms (+3.11%) [3.8903ms .. 3.8903ms] subfields=7 exists_json_union Memory: 120.9 KB (+106.93%) Avg: 3.6220ms (-16.22%) Median: 3.6220ms (-16.22%) [3.6220ms .. 3.6220ms] subfields=8 exists_json_union Memory: 121.3 KB (+106.23%) Avg: 4.0981ms (-15.97%) Median: 4.0981ms (-15.97%) [4.0981ms .. 4.0981ms] subfields=16 exists_json_union Memory: 123.1 KB (+103.09%) Avg: 4.3483ms (-92.26%) Median: 4.3483ms (-92.26%) [4.3483ms .. 4.3483ms] subfields=256 exists_json_union Memory: 204.6 KB (+19.85%) Avg: 3.8874ms (-99.01%) Median: 3.8874ms (-99.01%) [3.8874ms .. 3.8874ms] subfields=4096 exists_json_union Memory: 2.0 MB Avg: 3.5571ms (-99.90%) Median: 3.5571ms (-99.90%) [3.5571ms .. 3.5571ms] subfields=65536 exists_json_union Memory: 28.3 MB Avg: 14.4417ms (-99.97%) Median: 14.4417ms (-99.97%) [14.4417ms .. 14.4417ms] subfields=262144 exists_json_union Memory: 113.3 MB Avg: 66.2860ms (-99.95%) Median: 66.2860ms (-99.95%) [66.2860ms .. 66.2860ms] * rename methods