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Golang Writing memory efficient and CPU optimized Go Structs

Satyajit Roy on July 26, 2022

A struct is a typed collection of fields, useful for grouping data into records. This allows all the data relating to one entity to be neatly encap...

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Ankush Thakur • Jul 27 '22

🔥🔥🔥

Skysolderone • Jul 27 '22

thanks

Gustavo Giménez • Jul 30 '22

Great way to explain this topic. congrats

Satyajit Roy • Jul 30 '22

Thanks

Arpit Varshneya • Jul 28 '22 • Edited

Didn't get why empty pad of 7 bytes, 7 bytes and 4 bytes respectively were added to make the sum of 8 bytes by complier? Why 8?

Satyajit Roy • Jul 28 '22

Because, the current version of the standard Go compiler, the alignment guarantees of other types may be either 4 or 8, depends on different build target architectures. This is also true for gccgo.

SUDARSAN • Aug 3 '22

Thanks a lot of your detailed explanation. Helpful alot

Satyajit Roy • Aug 3 '22

Glad to know!!

૮༼⚆︿⚆༽つ • Jul 27 '22

Thanks for the write up! TIL, go compiler doesn't auto align the struct. I wonder if I should fit my struct to 128bit, hoping that the compiler will optimize some of r/w fields operation with SIMD instructions 🤔

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Francesco Casula • Feb 3 '24

Interesting article. A linter might be a good idea in this case. It could make writing memory optimized structs quite easy. It can be integrated in CI as well instead of having to always rely on code reviews etc...