feat(mango): keys-only covering indexes
#4482
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This pull request was closed by accident. |
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The PR was re-submitted as #4512. |
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This pull request aims to implement the first phase of the covering indexes work ("keys-only covering indexes") as it was described in the corresponding RFC document by @mikerhodes, see #4410 and #4413 for the details.
Ideally, end users should not notice any change in the behavior but speed-ups for certain kind of queries. Performance results obtained by k6 on my MacBook Pro 2021 M1 Max, with 10,000 documents, compared against
a9bce2f598edc8ef843baa9412c60d22157eeabfwith 3 nodes:min=0.60ms max=3223.65ms p(95)=2113.95ms p(98)=2354.79ms p(99)=2505.30msmin=0.50ms max=615.87ms p(95)=95.89ms p(98)=140.80ms p(99)=171.90msmin=73.09ms max=6245.72ms p(95)=3835.45ms p(98)=4376.79ms p(99)=5022.26msmin=2.65ms max=579.62ms p(95)=211.18ms p(98)=264.66ms p(99)=305.37msmin=0.80ms max=14991.06ms p(95)=13171.23ms p(98)=13975.51ms p(99)=14456.11msmin=0.87ms max=15379.69ms p(95)=10748.65ms p(98)=11998.88ms p(99)=12171.89msPlease find the details of the performance evaluation in
pgj/couchdb-k6/mango/couchdb_4482.Unit test coverage increased significantly, see before:
and then after:
Tasks:
src/docsfolder