Go Struct Field Alignment: How Memory Padding Wastes Your RAM

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You write a struct to represent a database entity. Maybe 10 fields, maybe 20. What could possibly go wrong? Nothing, according to your tests. But somewhere in production, your heap is 30% larger than it should be, your Garbage Collector is working overtime, and your L1 cache is not used properly. The reason? Invisible padding bytes silently inflating every instance of your struct. This is the…

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