Issues

• object model step 3: shapes-options +3.2% from runtime Object.create(P) key-add interception (fix in step 1)

  PerryTS/perry#12636 · Filter by author proggeramlug opened on Oct 15, 2026

• Object.prototype setter does not intercept a named store on an array (arr.zz = v creates an own key)

  PerryTS/perry#12635 · Filter by author proggeramlug opened on Oct 15, 2026

• ehfree: private-brand stack on the height rule (tscwork +0.13% after #12631)

  PerryTS/perry#12634 · Filter by author proggeramlug opened on Oct 15, 2026

• worker: terminate() does not stop a call-free loop

  PerryTS/perry#12633 · Filter by author proggeramlug opened on Oct 15, 2026

• async: finally around a suspended await is skipped when the promise rejects

  PerryTS/perry#12632 · Filter by author proggeramlug opened on Oct 15, 2026

• Builtin prototype parity: URLSearchParams/DisposableStack default prototype, custom new.target on fetch handle types

  PerryTS/perry#12629 · Filter by author proggeramlug opened on Oct 14, 2026

• Object model step 4: performance and memory regressions to win back in step 5

  PerryTS/perry#12618 · Filter by author proggeramlug opened on Oct 14, 2026

• GC decodes a Number whose bits equal an 8-aligned heap address as a pointer (raw-or-tagged word ambiguity)

  PerryTS/perry#12616 · Filter by author proggeramlug opened on Oct 14, 2026

• test_gap_repsel_element_group_numeric fails on main in every arm

  PerryTS/perry#12615 · Filter by author proggeramlug opened on Oct 14, 2026

• perf: generic own-presence probe for unknown-layout receivers (fastify +1.22%, named-array map) after step 7

  PerryTS/perry#12607 · Filter by author proggeramlug opened on Oct 14, 2026

• object model §6a: kind-2 program-symbol atoms need a traced value word in StaticAtom

  PerryTS/perry#12606 · Filter by author proggeramlug opened on Oct 14, 2026

• Hono SmartRouter fallback to TrieRouter throws undefined natively — every request fails

  PerryTS/perry#12594 · Filter by author proggeramlug opened on Oct 13, 2026

• a.method.call(b) on a foreign class instance uses the receiver's capture environment

  PerryTS/perry#12578 · Filter by author proggeramlug opened on Oct 13, 2026

• methodcert: tsc .text +75 KB from register spills at uncertified class-dispatch sites

  PerryTS/perry#12568 · Filter by author proggeramlug opened on Oct 13, 2026

• P0: after honest pointers (#12529), native handles in arithmetic/ToNumeric are treated as non-objects (1/new Headers() → typeof object)

  PerryTS/perry#12540 · Filter by author proggeramlug opened on Oct 13, 2026

• jsfields fix-forward: binarytrees_plain +0.64% (check() pays one extra instruction per call; share the receiver handle across a memo run)

  PerryTS/perry#12518 · Filter by author proggeramlug opened on Oct 12, 2026

• Born-old prototype births and old-arena teardown cost +0.8% on commander (no minor to amortise)

  PerryTS/perry#12508 · Filter by author proggeramlug opened on Oct 12, 2026

• classsem fix-forward: fastify .text +86 KB (per-class birth-shape/name data?)

  PerryTS/perry#12486 · Filter by author proggeramlug opened on Oct 12, 2026

• perf: string .length not typed as number, so sums go through js_dynamic_string_or_number_add (str grid 4–18× node)

  PerryTS/perry#12485 · Filter by author proggeramlug opened on Oct 12, 2026

• Stale codegen/runtime tests failing on main: native_root_coverage::array_birth, ic_fast_split, barrier_stem_census

  PerryTS/perry#12481 · Filter by author proggeramlug opened on Oct 12, 2026

• perf: GC tracing validates scanned pointers via ValidPointerSet hash lookup

  PerryTS/perry#12455 · Filter by author proggeramlug opened on Oct 12, 2026

• perf: per-allocation overhead: js_inline_arena_state (123 instr) per birth, barriers + note_black_birth on just-born objects

  PerryTS/perry#12454 · Filter by author proggeramlug opened on Oct 12, 2026

• perf: typed-array element access goes through js_dyn_index_get/set with GC barrier and string check; int32 elements compared generically

  PerryTS/perry#12453 · Filter by author proggeramlug opened on Oct 12, 2026

• worker_heavy +1.58% instructions after the parentPort/agent-liveness fix (#12285)

  PerryTS/perry#12448 · Filter by author proggeramlug opened on Oct 12, 2026

• keylists fix-forward: Effect RSS +28 MB (fewer minors, ArenaBytes full trigger) after stationary canonical keys

  PerryTS/perry#12425 · Filter by author proggeramlug opened on Oct 11, 2026