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cmd/compile: on amd64, compiler's Zero operation is slower than memclrNoHeapPointers for 1024-2048 bytes

compiler/runtimeIssues related to the Go compiler and/or runtime.Issues related to the Go compiler and/or runtime.

ImplementationIssues describing a semantics-preserving change to the Go implementation.Issues describing a semantics-preserving change to the Go implementation.

NeedsInvestigationSomeone must examine and confirm this is a valid issue and not a duplicate of an existing one.Someone must examine and confirm this is a valid issue and not a duplicate of an existing one.

Performance

Status: Open.

#74171 In golang/go;

· matloob opened on Jun 13, 2025

 ·  

Go1.26

cmd/compile: pointer shaped type with more than one field causes allocation when cast to interface

BugReportIssues describing a possible bug in the Go implementation.Issues describing a possible bug in the Go implementation.

compiler/runtimeIssues related to the Go compiler and/or runtime.Issues related to the Go compiler and/or runtime.

NeedsInvestigationSomeone must examine and confirm this is a valid issue and not a duplicate of an existing one.Someone must examine and confirm this is a valid issue and not a duplicate of an existing one.

Performance

Status: Open.

#74092 In golang/go;

· mcy opened on Jun 11, 2025

 ·  

Go1.26

runtime: 6.16% regression in PendingDemotion10000-72 sec/op on linux/arm64 at bfc2095

compiler/runtimeIssues related to the Go compiler and/or runtime.Issues related to the Go compiler and/or runtime.

NeedsInvestigationSomeone must examine and confirm this is a valid issue and not a duplicate of an existing one.Someone must examine and confirm this is a valid issue and not a duplicate of an existing one.

Performance

Status: Open.

#74003 In golang/go;

· mknyszek opened on Jun 4, 2025

 ·  

Go1.25

unique: 7.57% regression in ReplaceShortcodeTokens-72 sec/op on linux/arm64 at 0028532

NeedsInvestigationSomeone must examine and confirm this is a valid issue and not a duplicate of an existing one.Someone must examine and confirm this is a valid issue and not a duplicate of an existing one.

Performance

Status: Open.

#74001 In golang/go;

· mknyszek opened on Jun 4, 2025

 ·  

Backlog

runtime: 9.81% regression in ParallelizeUntil/pieces:1000,workers:10,chunkSize:1-88 sec/op on linux/amd64 at 0afcf91

compiler/runtimeIssues related to the Go compiler and/or runtime.Issues related to the Go compiler and/or runtime.

NeedsInvestigationSomeone must examine and confirm this is a valid issue and not a duplicate of an existing one.Someone must examine and confirm this is a valid issue and not a duplicate of an existing one.

Performance

Status: Open.

#74000 In golang/go;

· mknyszek opened on Jun 4, 2025

 ·  

Go1.25

math/big: 10.36% regression in ParseBigBytes-16 sec/op on linux/amd64 between c594762 and b3e3636

NeedsInvestigationSomeone must examine and confirm this is a valid issue and not a duplicate of an existing one.Someone must examine and confirm this is a valid issue and not a duplicate of an existing one.

Performance

Status: Open.

#73999 In golang/go;

· mknyszek opened on Jun 4, 2025

 ·  

Go1.25

unique: optimize interning of string([]byte) in structs/arrays

compiler/runtimeIssues related to the Go compiler and/or runtime.Issues related to the Go compiler and/or runtime.

ImplementationIssues describing a semantics-preserving change to the Go implementation.Issues describing a semantics-preserving change to the Go implementation.

NeedsInvestigationSomeone must examine and confirm this is a valid issue and not a duplicate of an existing one.Someone must examine and confirm this is a valid issue and not a duplicate of an existing one.

Performance

Status: Open.

#73821 In golang/go;

· jakebailey opened on May 22, 2025

 ·  

Backlog

proposal: testing: run tests in parallel by default

LibraryProposalIssues describing a requested change to the Go standard library or x/ libraries, but not to a toolIssues describing a requested change to the Go standard library or x/ libraries, but not to a tool

Performance

Proposal

Status: Open.

#73805 In golang/go;

· CAFxX opened on May 21, 2025

 ·  

Proposal

x/crypto/x509roots/fallback: high, unskippable, init cost

NeedsInvestigationSomeone must examine and confirm this is a valid issue and not a duplicate of an existing one.Someone must examine and confirm this is a valid issue and not a duplicate of an existing one.

Performance

Unfortunate

Status: Open.

#73691 In golang/go;

· twpayne opened on May 13, 2025

 ·  

Unreleased

cmd/compile: stronger constant propagation around closures

compiler/runtimeIssues related to the Go compiler and/or runtime.Issues related to the Go compiler and/or runtime.

FeatureRequestIssues asking for a new feature that does not need a proposal.Issues asking for a new feature that does not need a proposal.

NeedsInvestigationSomeone must examine and confirm this is a valid issue and not a duplicate of an existing one.Someone must examine and confirm this is a valid issue and not a duplicate of an existing one.

Performance

Status: Open.

#73601 In golang/go;

· adonovan opened on May 5, 2025

 ·  

Unplanned

cmd/compile: non-escaping pointer operations block register lifting of values

compiler/runtimeIssues related to the Go compiler and/or runtime.Issues related to the Go compiler and/or runtime.

NeedsInvestigationSomeone must examine and confirm this is a valid issue and not a duplicate of an existing one.Someone must examine and confirm this is a valid issue and not a duplicate of an existing one.

Performance

Status: Open.

#73589 In golang/go;

· mcy opened on May 2, 2025

 ·  

Unplanned

proposal: x/net/http2: allow configuring the buffer allocator to avoid copies during reads

LibraryProposalIssues describing a requested change to the Go standard library or x/ libraries, but not to a toolIssues describing a requested change to the Go standard library or x/ libraries, but not to a tool

Performance

Proposal

Status: Open.

#73560 In golang/go;

· arjan-bal opened on Apr 30, 2025

 ·  

Proposal