[HUDI-8802] Avoid unnecessary conversion between HoodieIndexAvroRecord and HoodieAvroRecord in HoodieFileSliceReader

[TheR1sing3un]

When HoodieFileSliceReader performs reading:
For base records that have a corresponding update record in the log file, it first converts the HoodieAvroIndexRecord format that it reads from the Base Reader to the HoodieAvroRecord format. Then when it performs the merge, it convert itself to the HoodieAvroIndexRecord, and since it was the HoodieAvroIndexRecord in the first place, this extra conversion is not necessary.

HoodieFileSlice

HoodieAvroRecordMerger

Change Logs

1. avoid unnecessary conversion between HoodieIndexAvroRecord and HoodieAvroRecord in HoodieFileSliceReader

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Impact

low
Describe any public API or user-facing feature change or any performance impact.

Risk level (write none, low medium or high below)

low
If medium or high, explain what verification was done to mitigate the risks.

Documentation Update

none
Describe any necessary documentation update if there is any new feature, config, or user-facing change. If not, put "none".

• The config description must be updated if new configs are added or the default value of the configs are changed
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Contributor's checklist

• Read through contributor's guide
• Change Logs and Impact were stated clearly
• Adequate tests were added if applicable
• CI passed

[hudi-bot]

CI report:

• d7717b2 Azure: SUCCESS

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