Details
Description
100-element $in queries appear to be an order of magnitude slower in v2.6.0-rc1 (even with lower_bound patch) than in v2.4.9:
Using the attached code:
v2.4.9:
ben@zzyzx:~/projects/mongo-utils/build$ ./in_query localhost:27017 100
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Total query time in miliseconds: 17
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Doc count: 10000
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ben@zzyzx:~/projects/mongo-utils/build$ ./in_query localhost:27017 100
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Total query time in miliseconds: 7
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Doc count: 10000
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ben@zzyzx:~/projects/mongo-utils/build$ ./in_query localhost:27017 100
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Total query time in miliseconds: 6
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Doc count: 10000
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RC1:
ben@zzyzx:~/projects/mongo-utils/build$ ./in_query localhost:27017 100
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Total query time in miliseconds: 101
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Doc count: 10000
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ben@zzyzx:~/projects/mongo-utils/build$ ./in_query localhost:27017 100
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Total query time in miliseconds: 82
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Doc count: 10000
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ben@zzyzx:~/projects/mongo-utils/build$ ./in_query localhost:27017 100
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Total query time in miliseconds: 104
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Doc count: 10000
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RC1 with binary search
ben@zzyzx:~/projects/mongo-utils/build$ ./in_query localhost:27017 100
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Total query time in miliseconds: 103
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Doc count: 10000
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ben@zzyzx:~/projects/mongo-utils/build$ ./in_query localhost:27017 100
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Total query time in miliseconds: 63
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Doc count: 10000
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ben@zzyzx:~/projects/mongo-utils/build$ ./in_query localhost:27017 100
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Total query time in miliseconds: 88
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Doc count: 10000
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ben@zzyzx:~/projects/mongo-utils/build$ ./in_query localhost:27017 100
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Total query time in miliseconds: 102
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Doc count: 10000
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RC1 with lower_bound:
ben@zzyzx:~/projects/mongo-utils/build$ ./in_query localhost:27017 100
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Total query time in miliseconds: 89
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Doc count: 10000
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ben@zzyzx:~/projects/mongo-utils/build$ ./in_query localhost:27017 100
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Total query time in miliseconds: 37
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Doc count: 10000
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ben@zzyzx:~/projects/mongo-utils/build$ ./in_query localhost:27017 100
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Total query time in miliseconds: 40
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Doc count: 10000
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ben@zzyzx:~/projects/mongo-utils/build$ ./in_query localhost:27017 100
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Total query time in miliseconds: 72
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Doc count: 10000
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Attachments
Issue Links
- duplicates
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SERVER-12952 Regex query performance regression in v2.6.0-rc0
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- Closed
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- is related to
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- Closed
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