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Implications of a second index on a timestamp field in a sequential table

I have a MySQL table of a few gigabytes with roughly ~100M rows. I store data sequentially, such that the timestamps increase as the ID also increases. Because ordering and filtering by the timestamp ...
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Fine grained (milliseconds) temporal indexes in neo4j

What are the best practices for modeling fine grained timelines in neo4j? If I were to use milliseconds as the grain in the pattern described here and here would it prove somehow problematic and ...