Benedict updated CASSANDRA-15215:
         Severity: Normal
       Complexity: Normal
    Discovered By: Code Inspection
     Bug Category: Parent values: Degradation(12984)Level 1 values: Performance 
           Status: Open  (was: Triage Needed)

> VIntCoding should read and write more efficiently
> -------------------------------------------------
>                 Key: CASSANDRA-15215
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-15215
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Local/Compaction, Local/SSTable
>            Reporter: Benedict
>            Priority: Normal
> Most vints occupy significantly fewer than 8 bytes, and most buffers have >= 
> 8 bytes spare, in which case we can construct the relevant bytes in a 
> register and memcpy them to the correct position.  Since we read and write a 
> lot of vints, this waste is probably measurable, particularly during 
> compaction and flush, and can probably be considered a performance bug.

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