Go Optimizations 101 Update History

v1.20.a (2023/Feb/01)

• In the "Function inlining" section of the "Functions" chapter, mentions containing type delcarations will not prevent a function from being inlined since Go toolchain 1.20. Many examples using local type declaration type _ int are modified accordingly, including the one in the last section ("Grow stack in less times") of the "Stack and Escape Analysis" chapter.
• In the "Arrays and Slices" chapter, mentions that copy(s, s) is a no-op, but append(s[:0], s...) is not.
• In the "BCE (Bound Check Eliminate)" chapter, mentions that -gcflags="-d=ssa/check_bce" doesn't work for some generic functions.

v1.19 (2022/Aug/28)

• the Garbage Collection chapter is updated much. The update contents are mainly in the last 4 sections (starting the Use new heap memory percentage strategy to control automatic GC frequency section). Some descriptions in the first section GC pacer are also modified a bit.
• in the Stack and Escape Analysis chapter, the descriptions about initial stack sizes in the Stacks growth and shrinkage section are modified.
• in the BCE chapter, a new Example 4 section is added. The example was in the Sometimes, the compiler needs some hints to remove some bound checks section.
• in the Functions chapter, the Which functions are inline-able? section states that functions containing select code blocks may be inlined since Go toolchain 1.19.

v1.17 (2021/Dec/22)

• published