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Use BinData for UUIDs/hashesBad:{ u: Optimizing MongoDB: Lessons Learned at Localytics

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Use BinData for UUIDs/hashesBad:{ u: “21EC2020-3AEA-1069-A2DD-08002B30309D”, // 36 bytes plus field overhead} Good:{ u: BinData(0, “…”), // 16 bytes plus field overhead}

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