build(deps): bump com.fasterxml.jackson.core:jackson-core from 2.16.1 to 2.17.0

[dependabot]

Bumps com.fasterxml.jackson.core:jackson-core from 2.16.1 to 2.17.0.

Commits

• 8fba680 [maven-release-plugin] prepare release jackson-core-2.17.0
• 486b33f Prepare for 2.17.0 release
• a6a1074 Merge branch '2.16' into 2.17
• e5b5e34 Back to snapshot deps
• 8938de4 [maven-release-plugin] prepare for next development iteration
• 4162dfc [maven-release-plugin] prepare release jackson-core-2.16.2
• 37ef9b3 Prepare for 2.16.2 release
• e2cc65d Bump the github-actions group with 3 updates (#1236)
• d29507f Improve #1149 wrt JsonParser.getNumberTypeFP() default implementation (#1235)
• 1994217 Add explicit override for JSON parsers for JsonParser.getNumberTypeFP()
• Additional commits viewable in compare view

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[franz1981]

FYI FasterXML/jackson-core#1250 (comment)

Bumping to newer version will make the pattern to thrown away object mappers, pretty dangerous performance wise (unless the object mappers is configured to use a ThreadLocal shared pool, likely - or reuse the same lock free shared pool, saved in some soft-ref singleton-like)

[franz1981]

@kittylyst @jponge @ehsavoie

[cowtowncoder]

One quick note: throwing away ObjectMappers has always been colossally bad idea, performance-wise. Not much has changed with 2.17: overhead of first call via mappers dwarfs any read/write activity in most use cases. So the best optimization tip one can give is to reuse mappers.
In the least bad case of using, say, ObjectMapper.readTree() (where no POJO introspection is needed), performance is 50% lower for small content. Same for serialization side.

In 2.17 there is additional potential hit due to change from ThreadLocal-based buffer pool to per-JsonFactory (and thereby per ObjectMapper), but that should usually be only modest additional injury to the main problem.

So, if there are use patterns where mappers are constructed on per-call basis, it would probably make sense to try to figure out if reuse it at all possible.

[franz1981]

Thanks for the details @cowtowncoder much appreciated!

[kittylyst]

Note that in this case, we send data once every 24 hours. Performance is not really a concern.

[cowtowncoder]

Ok that is good to know @kittylyst.

It sounds like upgrade should not change this situation, i.e. reuse or not is a pre-existing condition and tolerable since performance (of this aspect) doesn't matter a lot overall.

[dependabot]

Superseded by #217.