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Package goexperiment

Constants

const AliasTypeParams = true

const AliasTypeParamsInt = 1

const Arenas = false

const ArenasInt = 0

const BoringCrypto = false

const BoringCryptoInt = 0

const CacheProg = false

const CacheProgInt = 0

const CgoCheck2 = false

const CgoCheck2Int = 0

const CoverageRedesign = true

const CoverageRedesignInt = 1

const FieldTrack = false

const FieldTrackInt = 0

const HeapMinimum512KiB = false

const HeapMinimum512KiBInt = 0

const LoopVar = false

const LoopVarInt = 0

const NewInliner = false

const NewInlinerInt = 0

const PreemptibleLoops = false

const PreemptibleLoopsInt = 0

const RangeFunc = false

const RangeFuncInt = 0

const RegabiArgs = true

const RegabiArgsInt = 1

const RegabiWrappers = true

const RegabiWrappersInt = 1

const SpinbitMutex = true

const SpinbitMutexInt = 1

const StaticLockRanking = false

const StaticLockRankingInt = 0

const SwissMap = true

const SwissMapInt = 1

const SyncHashTrieMap = true

const SyncHashTrieMapInt = 1

const Synctest = false

const SynctestInt = 0

type Flags ¶

Flags is the set of experiments that can be enabled or disabled in the current toolchain.

When specified in the GOEXPERIMENT environment variable or as build tags, experiments use the strings.ToLower of their field name.

For the baseline experimental configuration, see internal/buildcfg.ParseGOEXPERIMENT.

If you change this struct definition, run "go generate".

type Flags struct {
    FieldTrack        bool
    PreemptibleLoops  bool
    StaticLockRanking bool
    BoringCrypto      bool

    // RegabiWrappers enables ABI wrappers for calling between
    // ABI0 and ABIInternal functions. Without this, the ABIs are
    // assumed to be identical so cross-ABI calls are direct.
    RegabiWrappers bool
    // RegabiArgs enables register arguments/results in all
    // compiled Go functions.
    //
    // Requires wrappers (to do ABI translation), and reflect (so
    // reflection calls use registers).
    RegabiArgs bool

    // HeapMinimum512KiB reduces the minimum heap size to 512 KiB.
    //
    // This was originally reduced as part of PacerRedesign, but
    // has been broken out to its own experiment that is disabled
    // by default.
    HeapMinimum512KiB bool

    // CoverageRedesign enables the new compiler-based code coverage
    // tooling.
    CoverageRedesign bool

    // Arenas causes the "arena" standard library package to be visible
    // to the outside world.
    Arenas bool

    // CgoCheck2 enables an expensive cgo rule checker.
    // When this experiment is enabled, cgo rule checks occur regardless
    // of the GODEBUG=cgocheck setting provided at runtime.
    CgoCheck2 bool

    // LoopVar changes loop semantics so that each iteration gets its own
    // copy of the iteration variable.
    LoopVar bool

    // CacheProg adds support to cmd/go to use a child process to implement
    // the build cache; see https://github.com/golang/go/issues/59719.
    CacheProg bool

    // NewInliner enables a new+improved version of the function
    // inlining phase within the Go compiler.
    NewInliner bool

    // RangeFunc enables range over func.
    RangeFunc bool

    // AliasTypeParams enables type parameters for alias types.
    // Requires that gotypesalias=1 is set with GODEBUG.
    // This flag will be removed with Go 1.25.
    AliasTypeParams bool

    // SwissMap enables the SwissTable-based map implementation.
    SwissMap bool

    // SpinbitMutex enables the new "spinbit" mutex implementation on supported
    // platforms. See https://go.dev/issue/68578.
    SpinbitMutex bool

    // SyncHashTrieMap enables the HashTrieMap sync.Map implementation.
    SyncHashTrieMap bool

    // Synctest enables the testing/synctest package.
    Synctest bool
}