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runtime: implement experiment to replace heap bitmap with alloc headers #golang

TLDR: This change replaces the 1-bit-per-word heap bitmap. The purpose of this change is performance. There's a flat 1.5% memory use reduction.

https://go-review.googlesource.com/c/go/+/437955

Also, where is a ticket?? 😒
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2024 is gonna be awesome #golang (screenshot from "Go compiler and runtime meeting notes")

https://github.com/golang/go/issues/43930#issuecomment-1874498879
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crypto/rsa,crypto/internal/bigmod: improve verify/encrypt performance by @FiloSottile #golang

https://github.com/golang/go/commit/b2dbfbfc2315557815e1d5de12f28ed57f60958a
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πŸŽ‰ Go 1.22 Release Candidate 2 is released!

πŸƒβ€β™‚οΈ Run it in dev! Run it in prod! File bugs! go.dev/issue/new

πŸ“£ Announcement:
https://groups.google.com/g/golang-announce/c/ktlSOU6z65Y

πŸ—ƒ Download: go.dev/dl/#go1.22rc2

#golang
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πŸ‘¨πŸ»β€πŸ”¬ Go memory metrics demystified:

- How does process RSS relate to go memory metrics?
- How do you identify off-heap allocation problems?
- Why does the heap profile under-report memory usage by 2x?

https://www.datadoghq.com/blog/go-memory-metrics/
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That will be awesome if SwissTable will land in #golang🀞(1.23 or 1.24?)

https://github.com/golang/go/issues/54766#issuecomment-1964278472
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2025/07/09 10:54:58
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