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More efficient constructor for SerializationEnum #57887

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canhld94
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@canhld94 canhld94 commented Dec 15, 2023

Motivation: we use some long enum types with > 200 elements, and constructing serialisation for them is not trivial. But getDefaultSerialization() is used in many places, and it often appear in CPU profiling:

image

The issue is: each calls to getDefaultSerialization create a copy of EnumValues (that is one vector and two maps) while it can reuse the EnumValues from DataTypeEnum. So here this PR tries to do that.

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Signed-off-by: Duc Canh Le <duccanh.le@ahrefs.com>
@rschu1ze rschu1ze self-assigned this Dec 15, 2023
Co-authored-by: Robert Schulze <robert@clickhouse.com>
Signed-off-by: Duc Canh Le <duccanh.le@ahrefs.com>
@rschu1ze rschu1ze added the can be tested Allows running workflows for external contributors label Dec 19, 2023
@robot-ch-test-poll2 robot-ch-test-poll2 added the pr-not-for-changelog This PR should not be mentioned in the changelog label Dec 19, 2023
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robot-ch-test-poll2 commented Dec 19, 2023

This is an automated comment for commit b07cde5 with description of existing statuses. It's updated for the latest CI running

❌ Click here to open a full report in a separate page

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Check nameDescriptionStatus
AST fuzzerRuns randomly generated queries to catch program errors. The build type is optionally given in parenthesis. If it fails, ask a maintainer for help✅ success
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@rschu1ze rschu1ze merged commit f503aa7 into ClickHouse:master Dec 19, 2023
337 of 344 checks passed
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