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183b6b4963
go/doc/next/5-toolchain.md
Than McIntosh 0767ffdf27 doc: add relnote fragment on stack slot merging 
Add a blurb to the toolchain section talking about stack slot merging.

Updates #62737.

Change-Id: I26193a6a381c95ff5d79ce80b77c10c7561d00cc
Reviewed-on: https://go-review.googlesource.com/c/go/+/581439
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Austin Clements <austin@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
2024-05-14 17:18:10 +00:00

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Compiler

The build time overhead to building with Profile Guided Optimization has been reduced significantly. Previously, large builds could see 100%+ build time increase from enabling PGO. In Go 1.23, overhead should be in the single digit percentages.

The compiler in Go 1.23 can now overlap the stack frame slots of local variables accessed in disjoint regions of a function, which reduces stack usage for Go applications.

Assembler

Linker