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    Type:Improvement 
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    Resolution: Unresolved
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    Priority:Minor - P4 
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    Affects Version/s: None
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    Component/s: Performance
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The !doc macro appears to be very slow. I can push 1M integers onto a Rust vec in 52ms, 1M JavaScript objects onto a JS array in 688ms, but it takes 6328ms to push 1M doc!s onto a Rust vec.