Nightly

Stripped ReleaseFast zjs CLI for easy-install / js-engine-benchmark.

zjs v0.1.0

First real release, replacing 0.1.0-alpha.1 and 0.1.0-alpha.2. The checked
test262 profile reports zero failures (44,581 pass). The 15-item javascript-zoo
geomean is 1.0141 vs QuickJS. Trusted-code embedding positioning is unchanged:
zjs is not an in-process sandbox for hostile JavaScript.

• Completed QCP-1B: removed the legacy Phase 1/2/3 compiler, dual comparator,
  and -Dzjs_compiler option. Deletion bisection traced the former crypto
  regression to shrinking CompileContext by one unused pointer, which
  perturbed Zig 0.16 whole-program native layout despite identical bytecode and
  allocation streams. The same-sized reserved word was used only as a control;
  the shipped fix restores explicit non-inlined boundaries around V2 lowering
  and the stack-size walk. The no-padding deletion candidate measures 1.0061x
  on the 15-item Zoo A/B. The diagnosis and amended verdict are in
  docs/qcp1_switch_decision.md §9.
• Fixed Array sort writeback when an indexed setter mutates a successor
  element, Error.prototype.stack setter edge cases, and TypedArray
  DefineOwnProperty detach-during-conversion semantics.
• Removed the historical C QuickJS performance comparison workflow and
  perf-compare; the checked performance gate is the ZJS self-baseline.
• Added a run_runtime_profile.js helper and zig build perf-uri-profile
  shortcut for checked single-script --perf-json artifacts that stay separate
  from multi-case microbench reports.
• Extended checked runtime-profile artifacts with opcode summary rows and added
  opcode-specific runtime diff metrics such as opcode_count:get_var_ref0.
• Added deterministic opcode-count ceilings to checked runtime-profile runs so
  focused hot-path fusions fail loudly when their opcode reductions disappear.
• Added diff_runtime_profile.js so single-script runtime profiles can be
  compared with explicit timing/allocation regression and improvement gates.
• Added an empty checked-local int32 for-loop range skip for loops whose body is
  only the induction update, reducing the empty_loop profile from 60007
  opcodes to 7 while preserving interrupt fallback.
• Added a dense array indexed append fast path for simple int32 multiply/mask
  element expressions while preserving inherited indexed setter fallback.
• Added a var-local int32 arithmetic-store fast path for microbench-style loop
  bodies without changing loop condition or post-update semantics.
• Added narrow String.fromCharCode and Math.min/Math.max method-call fast
  paths that keep object coercion and monkey-patched methods on the generic
  call path.
• Added local, closure, and global simple-numeric bytecode call add-store fast
  paths for tight acc += fn(i, c) loops while preserving non-simple function
  side effects.
• Tightened the URI 4-byte decode comparison fast path to use a borrowed
  native-method guard instead of transient method value dup/free churn.
• Shortened the percent-hex simple string add-store path used by URI decode
  fixtures by avoiding the transient helper result value before global writeback.
• Added a guarded make_var_ref assignment fusion for global = string + percentHex(int) loops so reference setup and put_ref_value are skipped when
  all participating bindings are ordinary global data properties.
• Added matching global-string and literal-prefix declaration initializer
  fusions for var next = prefix + percentHex(int) and var next = "%F0%A0" + percentHex(int), eliminating the URI 4-byte profile's remaining
  get_var_ref0 executions.
• Added a backward-goto global int32 condition fusion that replays the target
  loop condition directly at the backedge when it is an ordinary global data
  comparison, reducing the URI 4-byte profile's get_var executions by 66576.
• Extended the URI strict-equality branch-count fusion to ordinary global data
  count++, reducing the URI 4-byte profile's if_false8 executions from
  65536 to 1 and its get_var executions by another 65535.
• Refreshed active documentation to match the current build steps, test262
  boundary, ZJS self-baseline performance gate, and tracked active reports.
• Removed the completed Production v1 roadmap from the active docs; public API,
  compatibility, and release-checklist docs are the current authorities.
• Merged the small Compatibility v1 summary into COMPATIBILITY.md so the
  compatibility boundary has one active source of truth.
• Removed old one-off test262 slice and QuickJS comparison report directories
  from reports/; the active gate report remains reports/test262-latest/.
• Removed the future-oriented Bun/uWS GC design note from the active docs; the
  current GC boundary remains documented in README.md and LIMITATIONS.md.
• Removed the unused opcode-alignment report snapshot from reports/.
• Removed historical phase/ledger documents from the active tree:
  docs/gc-memory-lifecycle-candidates.md, docs/perf/roadmap.md, and
  reports/perf/baseline/phase-a-baseline.md.

Evidence

• engine-production-gate green from a clean checkout at 2b58a5e1 (log attached: zjs-v0.1.0-gate-evidence.txt); ReleaseSafe suite: 2266 passed / 1 skipped / 0 failed.
• test262: 0/49,775 errors, 44,581 pass; corpus pin 4249661388e5d3f92a85186213da140a6481490f, config test262.conf.
• Performance: maintainer-measured on ARM Cortex-X925 / Linux 6.17 vs QuickJS pin 04be246 (upstream Makefile default release build, GCC 13.3.0). Verdict and per-benchmark attribution: reports/perf/qjs-align/PARITY-LEDGER.md (2026-08-17 收尾终章) and reports/perf/qjs-align/2026-08-17/. No independent reproduction yet.
• Authoritative status page: STATUS.md. Boundary: trusted-code embedding only (docs/security-boundary.md).