Precalculate offset of field and use `unsafe` to read data.

[flycash]

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Summary

Now, several APIs rely on reflection package to fetch the value by field name. But I think we can use unsafe instead. Here is the point:

• When we initiate model's metadata, we know the offset of each fields
• When we read from data of specific field, we use this offset and rebuild the data based on its type
• We need benchmark tests to compare unsafe and reflection

(State a summary of your enhancement suggestion)

What version of EQL are you using?

What version of Go are you using?

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What is the current design/solution/implementation?

(If you can, link to the line of code that could be improved)

What could be made better?

(What you think should be enhanced and how?)

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This issue is inactive for a long time.