Issues

• GC roots: statepoints on every target — lower statepoints to a linear-memory frame on wasm and delete the shadow-frame mode (after #12023)

  PerryTS/perry#12044 · Filter by author proggeramlug opened on Oct 5, 2026

• GC roots: statepoints only — make statepoint lowering linear and remove the shadow-frame size path (#11960)

  PerryTS/perry#12023 · Filter by author proggeramlug opened on Oct 5, 2026
  1

• perf: class method value lookup/binding (method read as a value, not called) is ~3.3% of tsc/Zod/fastify self-time

  PerryTS/perry#12016 · Filter by author proggeramlug opened on Oct 5, 2026

• perf: object metadata/enumeration helpers are ~7.6% of real-program self-time with no covering issue

  PerryTS/perry#12015 · Filter by author proggeramlug opened on Oct 5, 2026

• const C = class {} has no TDZ and an empty name (node: ReferenceError before the declaration; C.name === 'C')

  PerryTS/perry#12007 · Filter by author proggeramlug opened on Oct 5, 2026

• GC: the safepoint kind that first sees a due trigger decides budgeted vs sync full (tsc fulls 73–84, ±1.5% instructions)

  PerryTS/perry#11988 · Filter by author proggeramlug opened on Oct 4, 2026
  1

• regression(#11963): qs and typescript fail with a spurious TDZ ReferenceError ('Cannot access ... before initialization')

  PerryTS/perry#11975 · Filter by author proggeramlug opened on Oct 4, 2026

• fs stream root scanner panics 'RefCell already borrowed' if a collection runs inside the stream-registry borrow

  PerryTS/perry#11953 · Filter by author proggeramlug opened on Oct 4, 2026

• GC: root the native and compiled-frame holders that make an allocation-point collection unsafe (prereq for dropping the #11873 scan fallback)

  PerryTS/perry#11951 · Filter by author proggeramlug opened on Oct 4, 2026

• Static reads of builtin constructor members (Map.name, Object.length) ignore delete

  PerryTS/perry#11948 · Filter by author proggeramlug opened on Oct 4, 2026

• new Proxy(urlSearchParamsSubclassInstance) instanceof URLSearchParams is false (node: true)

  PerryTS/perry#11935 · Filter by author proggeramlug opened on Oct 4, 2026

• is_callable_function_value reads a GC header at payload-8 for small-id values (Proxy ids, handles): unmapped read

  PerryTS/perry#11934 · Filter by author proggeramlug opened on Oct 4, 2026

• prettier: 95% of method-call sites are refused as not_ordinary and never cache (73% of runtime on the miss path)

  PerryTS/perry#11932 · Filter by author proggeramlug opened on Oct 4, 2026
  2

• Tracking: every native handle becomes an ordinary GC object that owns its payload; delete the handle registries

  PerryTS/perry#11919 · Filter by author proggeramlug opened on Oct 4, 2026
  7

• Method calls lowered by name ignore the receiver's actual method (.call rewrites, borrowed builtins, Date, Map/Set/Symbol dispatch, noop placeholders)

  PerryTS/perry#11915 · Filter by author proggeramlug opened on Oct 4, 2026

• Title

  PerryTS/perry#11905 · Filter by author proggeramlug opened on Oct 4, 2026

• RegExp is not an ordinary object: six spec-observability rows differ from node

  PerryTS/perry#11881 · Filter by author proggeramlug opened on Oct 4, 2026

• gc-root-dominance: stack-slot rooting mode misses array-element loads and slot-to-slot copies

  PerryTS/perry#11871 · Filter by author proggeramlug opened on Oct 4, 2026

• new Map() runs a getter installed on globalThis.Map twice

  PerryTS/perry#11869 · Filter by author proggeramlug opened on Oct 4, 2026

• node:stream holds the stream in unrooted locals across allocations: hidden_key allocates after the stream is read; crash in ns_readable_from_drain

  PerryTS/perry#11828 · Filter by author proggeramlug opened on Oct 3, 2026

• A perry that cannot find its workspace silently drops the wasm-host runtime (and auto-optimize): WebAssembly programs fail to link with no hint

  PerryTS/perry#11824 · Filter by author proggeramlug opened on Oct 3, 2026
  1

• gc-root-dominance checker cannot see unrooted NaN-boxed values live across a collecting call (#11789 class)

  PerryTS/perry#11804 · Filter by author proggeramlug opened on Oct 3, 2026

• Private brands as own keys push every instance off the class birth shape (method calls 7.5k instructions)

  PerryTS/perry#11791 · Filter by author proggeramlug opened on Oct 3, 2026
  2

• perf(string): repeated immutable prefix + number materializes separate flat strings; measure prefix-sharing opportunity

  PerryTS/perry#11745 · Filter by author proggeramlug opened on Oct 2, 2026

• perf(array): empty child arrays reserve 16 slots; 1.25 MiB of 1.50 MiB live array storage is unused in cyclic workload

  PerryTS/perry#11744 · Filter by author proggeramlug opened on Oct 2, 2026