v16.15.0

v16.15.0 (2026-11-04)

New Feature 🚀

• #4984 Backport work to v16 (@yaacovCR)

Backports:

• Fix performance issue with ESLint (#3586)
• refactor: add map keyed by set membership (#4836)
• perf: reuse fragment dependencies across operations (#4920)
• perf: reuse fragment variable usages (#4921)
• perf: share fragment collection across operations (#4925)
• refactor: track fragment validation work (#4946)
• refactor: simplify referenced fragment collection (#4948)
• perf: share subscription fragment lookups (#4927)
• refactor: extract visitSelectionSets (#4947)
• refactor: account for subscription field collection (#4949)
• perf: reuse identical field return types (#4940)
• perf: reuse field return type names (#4941)
• perf: reuse field return type descriptions (#4944)
• refactor: account for field return type comparisons (#4951)
• perf: skip selection sets with no fields to compare (#4960)
• perf: skip pair metadata for compatible leaf fields (#4964)
• perf: reuse introspection fragment checks (#4932)
• perf: reuse fragment checks from fields exceeding the introspection depth (#4971)
• perf: share source location lookups (#4936)
• perf: scan single source locations directly (#4958)
• refactor: stream printer output (#4952)
• feat: configure printer indentation depth (#4953)
• perf: flatten input-value printing (#4972)
• perf: avoid arrays for single-line printer text (#4973)
• perf: assemble printer output as a string (#4974)
• perf: skip empty printer work (#4975)
• perf: add a minimal AST reducer for printing (#4976)
• perf: index directive argument names (#4942)
• feat: Allow skipping suggestions (#4214)
• fix: skip disabled argument suggestions (#4937)
• fix(execute): handle defaultTypeResolver promise rejections (#4646)
• fix(mapAsyncIterable): always close source when mapped iterable is thrown (#4494)
• fix(valueFromAST): forward port #4652 (#4671)
• fix: avoid inherited variable getters in nested literal values (#4983)
• fix(changelog): ignore open associated PRs (#4723)

Bug Fix 🐞

• #4900 Backport OverlappingFieldsCanMerge changes (v16) (@yaacovCR)
• #4909 Backport maxLexicalTokens, maxComments, maxSourceLength parser options (v16) (@yaacovCR)
• #4917 fix: bound shared fragment traversal in introspection validation (v16) (@yaacovCR)

Docs 📝

• #4911 docs: backport v17 updates to v16 (@yaacovCR)

Internal 🏠

• #4826 chore(release): protect latest release channels from v16 (@yaacovCR)

Committers: 1

• Yaacov Rydzinski (@yaacovCR)