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Type: Task
Resolution: Fixed
Priority: Major - P3
Fix Version/s: 8.1.0-rc0, 8.0.0-rc7
Affects Version/s: None
Component/s: None
Labels:
- perf-8.0
- perf-8.0-read

Assigned Teams:

Query Optimization
Backwards Compatibility:
Fully Compatible
Backport Requested:

v8.0
Confidence Status:
None
Work Order:
3
CAR Domain/s:
None

Aha! Reference:
None
Tracking Level:
None
Risk Status:
None
Exec Notes:
None
Goal Name(s):
None
Goal Link:
None

The investigation in PERF-5073 found that a key contributor to the regressions in the initialization of CanonicalQuery is the creation of a new BSONObj for each MatchExpression.

By keeping alive or moving the original BSONObj, we can reduce the cost of CanonicalQuery initialization in some cases by 50%.

This ticket will introduce the final change in expression_leaf.cpp and expression_leaf.h to remove the use of _backingBSON BSONObj

depends on

SERVER-89532 Update all unit tests to respect BSONObj lifetime contract of MatchExpression

Closed

SERVER-89834 Update MatchExpression optimizations to respect BSON lifetime

Closed

SERVER-89151 Update change stream helpers to ensure BSONObj ownership

Closed

SERVER-89152 Update lookup foreign collation to ensure BSONObj ownership

Closed

SERVER-89153 Update FLE2 to ensure BSONObj ownership

Closed

SERVER-90079 Update IndexBound translation to ensure correctness and performance despite changes in MatchExpression BSONObj

Closed

is duplicated by

SERVER-90079 Update IndexBound translation to ensure correctness and performance despite changes in MatchExpression BSONObj

Closed

is related to

SERVER-101003 Provide BSON views that keep the buffer alive

Closed

(1 depends on, 1 is duplicated by, 1 is related to)

Assignee:: Matt Olma
Reporter:: Matt Olma
Participants:: Githook User, Matt Olma
Votes:: 0 Vote for this issue
Watchers:: 9 Start watching this issue

Created:: Feb 29 2024 05:15:59 PM UTC
Updated:: Feb 18 2025 07:39:32 PM UTC
Resolved:: May 30 2024 12:35:13 AM UTC
Confidence Status Last Update:: 04/Mar/24 7:02 PM

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