Bump Jint from 4.9.3 to 4.11.0

[dependabot]

Updated Jint from 4.9.3 to 4.11.0.

Release notes

Sourced from Jint's releases.

4.11.0

Jint 4.11.0 is a performance-focused release. It completes the move to a hidden-class shape model for the object system and adds a family of unboxed interpreter fast lanes, so the most common patterns — object and array construction, property access, tight numeric loops, and eval — do less work and allocate far less memory, with no change to behavior.

Highlights

• Object model. Object literals, hot constructor instances, and the built-in prototypes now use hidden-class shapes, and small objects store their properties inline in a single allocation (#​2548, #​2552, #​2553, #​2554, #​2555, #​2556, #​2557, #​2559). Property reads and writes are served by inline caches (#​2546, #​2558).
• Interpreter fast lanes. Relational tests and plain/compound assignments against slot-stored numbers now run unboxed, removing per-iteration boxing from loops (#​2550, #​2566, #​2574, #​2577, #​2578). Strict eval runs in slot-backed environments (#​2565), direct-recursive calls pool their environments (#​2549), and Function-constructor instances reuse a definition-level environment (#​2579).
• Lower memory. Function.prototype.toString source-text retention is now opt-in (#​2562), and the changes above cut allocations across the board — direct recursion, for example, allocates up to ~99% less.
• Correctness. Fixes for async parameter binding after await (#​2567), Map iteration during mutation (#​2570), and ShadowRealm evaluation of super / new.target (#​2573).

Across the managed JavaScript engines for .NET, Jint 4.11.0 is the fastest on most object, string and regex workloads — 1.7–5× over the next-fastest engine — while allocating 2–63× less memory than the closest competitor. See the engine comparison benchmarks for the full table.

[!WARNING]
Function.prototype.toString() no longer returns source text by default. To cut memory use (#​2560), the engine no longer retains each parsed function's source string, so toString() now returns a function name() { [native code] } placeholder instead of the original source. If your scripts — or a library you host — depend on toString() returning real source, re-enable it with new Engine(options => options.RetainFunctionSourceText()) (equivalently Options.RetainFunctionSourceText = true, or the matching RetainFunctionSourceText flag on ScriptParsingOptions / ModuleParsingOptions and prepared scripts).

Performance caveat: turning it back on restores the previous memory behavior — every parsed function pins its full source string, so caching many or large prepared scripts can retain hundreds of MB of duplicated source (the retention that #​2560 was filed to fix). Enable it only when you actually need the source text.

What's Changed

• Add write-side inline cache for property assignment (obj.prop = value) by @​lahma in Add write-side inline cache for property assignment (obj.prop = value) sebastienros/jint#2546
• Zero-copy SlicedString search (indexOf/startsWith/endsWith/includes) by @​lahma in Zero-copy SlicedString search (indexOf/startsWith/endsWith/includes) sebastienros/jint#2547
• Pool environments for direct-recursive functions (fib(30): -99.75% allocation) by @​lahma in Pool environments for direct-recursive functions (fib(30): -99.75% allocation) sebastienros/jint#2549
• Unboxed fast path for plain numeric assignment (s = a op b) by @​lahma in Unboxed fast path for plain numeric assignment (s = a op b) sebastienros/jint#2550
• Build small object literals in O(1) with cached keys, no extra allocation by @​lahma in Build small object literals in O(1) with cached keys, no extra allocation sebastienros/jint#2548
• Bump the analyzers group with 1 update by @​dependabot[bot] in Bump the analyzers group with 1 update sebastienros/jint#2551
• Hidden-class shapes for object literals (−50/72% literal allocation) by @​lahma in Hidden-class shapes for object literals (−50/72% literal allocation) sebastienros/jint#2552
• Shape hot constructors' instances (−22..36% Constructor allocation) by @​lahma in Shape hot constructors' instances (−22..36% Constructor allocation) sebastienros/jint#2553
• Generated built-in shape for Math: −67% per-realm init overhead (B1 pilot) by @​lahma in Generated built-in shape for Math: −67% per-realm init overhead (B1 pilot) sebastienros/jint#2554
• Built-in shapes via source generator: one-liner opt-in (Math, JSON, Reflect, Atomics) by @​lahma in Built-in shapes via source generator: one-liner opt-in (Math, JSON, Reflect, Atomics) sebastienros/jint#2555
• Built-in shapes default-on via base class (opt-out); shape Temporal.Now by @​lahma in Built-in shapes default-on via base class (opt-out); shape Temporal.Now sebastienros/jint#2556
• Built-in shapes: support per-realm instance properties; shape the Generator prototypes by @​lahma in Built-in shapes: support per-realm instance properties; shape the Generator prototypes sebastienros/jint#2557
• Prototype-method inline cache for obj.method resolved on the direct prototype by @​lahma in Prototype-method inline cache for obj.method resolved on the direct prototype sebastienros/jint#2558
• In-object properties: small shaped objects store slots inline (one allocation, not two) by @​lahma in In-object properties: small shaped objects store slots inline (one allocation, not two) sebastienros/jint#2559
• Refresh engine comparison benchmark results by @​lahma in Refresh engine comparison benchmark results sebastienros/jint#2561
• Make Function.prototype.toString() source text retention opt-in (#​2560) by @​lahma in Make Function.prototype.toString() source text retention opt-in (#2560) sebastienros/jint#2562
• Fix async function parameter binding after await resumption by @​lahma in Fix async function parameter binding after await resumption sebastienros/jint#2567
• Fix Map keys()/values() throwing InvalidOperationException on mutation by @​svenrog in Fix Map keys()/values() throwing InvalidOperationException on mutation sebastienros/jint#2570
• Slot-backed strict-eval environments with per-source pooling by @​lahma in Slot-backed strict-eval environments with per-source pooling sebastienros/jint#2565
• Slot fast path for compound assignment to non-number bindings by @​lahma in Slot fast path for compound assignment to non-number bindings sebastienros/jint#2566
• Share compiled statement lists across generator and async invocations by @​lahma in Share compiled statement lists across generator and async invocations sebastienros/jint#2571
• Fix ShadowRealm.prototype.evaluate rejecting super and new.target in nested code by @​lahma in Fix ShadowRealm.prototype.evaluate rejecting super and new.target in nested code sebastienros/jint#2573
• Per-engine environment caches: prepared scripts no longer pin engines; computed-key and escape-analysis fixes by @​lahma in Per-engine environment caches: prepared scripts no longer pin engines; computed-key and escape-analysis fixes sebastienros/jint#2568
• Unboxed lane for relational tests against slot-stored numbers by @​lahma in Unboxed lane for relational tests against slot-stored numbers sebastienros/jint#2574
• Extend the unboxed relational-test lane to variable bounds by @​lahma in Extend the unboxed relational-test lane to variable bounds sebastienros/jint#2578
• Slot lane for plain assignment to local bindings by @​lahma in Slot lane for plain assignment to local bindings sebastienros/jint#2577
• Definition-level environment reuse for Function-constructor instances by @​lahma in Definition-level environment reuse for Function-constructor instances sebastienros/jint#2579
• Refresh engine comparison benchmark results by @​lahma in Refresh engine comparison benchmark results sebastienros/jint#2572

New Contributors

• @​svenrog made their first contribution in Fix Map keys()/values() throwing InvalidOperationException on mutation sebastienros/jint#2570

Full Changelog: sebastienros/jint@v4.10.1...v4.11.0
... (truncated)

4.10.1

Overview

Jint 4.10.1 is a small follow-up to 4.10.0 that continues the memory-reduction work. Arrays no longer carry a dedicated PropertyDescriptor for their length (#​2540) and an extra PropertyDescriptor allocation on the data-property creation path was removed (#​2537), trimming GC pressure further with no code changes required. It also fixes a strict-mode spec gap where writing to a read-only array index failed to throw a TypeError (#​2542), and refreshes the engine-comparison benchmarks (#​2517) and dependencies (#​2545).

What's Changed

• Refresh engine comparison benchmark results by @​lahma in Refresh engine comparison benchmark results sebastienros/jint#2517
• Reduce PropertyDescriptor allocations in hot paths by @​lahma in Reduce PropertyDescriptor allocations in hot paths sebastienros/jint#2537
• Store array length inline to avoid a per-array PropertyDescriptor by @​lahma in Store array length inline to avoid a per-array PropertyDescriptor sebastienros/jint#2540
• Fix readonly array descriptors not throwing TypeError in strict mode by @​lahma with @​Copilot in Fix readonly array descriptors not throwing TypeError in strict mode sebastienros/jint#2542
• Upgrade dependencies, fix MA0074 build errors, and group dependabot updates by @​lahma in Upgrade dependencies, fix MA0074 build errors, and group dependabot updates sebastienros/jint#2545

Full Changelog: sebastienros/jint@v4.10.0...v4.10.1

4.10.0

Overview

Jint 4.10.0 is a performance- and memory-focused release. The bulk of this cycle went into making the interpreter run faster and allocate less, with additional work on CLR interop speed and diagnostics, plus a handful of correctness and spec-compliance fixes.

If you execute the same scripts repeatedly, run interop-heavy workloads, or care about GC pressure, this release should give you a meaningful, no-code-changes-required speedup.

Highlights

Interpreter performance

• New fast paths for object method calls (#​2510), computed dense-array reads/writes (#​2511), and global variable / x++ updates via version-gated inline caches (#​2507, #​2514).
• Function-call overhead reduced: function-local numbers stored unboxed in environment slots (#​2499), FunctionDeclarationInstantiation skipped entirely when there's nothing to do (#​2502), lazy constructor .prototype creation (#​2512), and no more per-call closure allocation in EvaluateBody (#​2534).
• A compilation cache for repeated eval and new Function sources (#​2503), and a fix for prepared scripts that were running slower than re-parsed source (#​2504).
• Process-wide cache of compiled regex adaptations (#​2530) and a faster String.prototype.split with a string separator (#​2519).

Reduced allocations & memory footprint

• Zero-copy views returned from large slice / substring / substr results, extended to bounded-waste substrings (#​2506, #​2518).
• A pooled accumulator slashes intermediate allocations in array-building built-ins, extended to RegExp split, Iterator.toArray, and object enumeration (#​2524, #​2526).
• Pooled for-loop iteration environments (#​2515), preserved dictionary capacity across pooled function-environment reuse (#​2528), and a raised fixed-slot environment cap (16 → 24 bindings) (#​2529).
• Smaller runtime objects: JsDate shrunk by 8 bytes (#​2535) and ObjectInstance slimmed by relocating _privateElements to a per-engine weak table (#​2536).

CLR interop

• Lower method-dispatch overhead and fewer allocations (#​2520), no per-access parameter-array allocation in indexer reads (#​2521), and an opt-in bounded cache for recently wrapped CLR objects (#​2522).
• Customizable reported property keys for CLR objects, enabling for..in over wrapped objects (#​2516).
• Richer interop resolution errors that include the target type, arguments, and candidate signatures — gated behind an opt-in option, with the CLR type exposed to the host (#​2525, #​2527).

Correctness & spec compliance

• Fixed completion value being clobbered by a re-entrant Evaluate() during module execution (#​2493).
• Fixed runtime type-member writes for CLR wrappers (#​2496) and DefaultTypeConverter.Convert bypassing subclass TryConvert overrides (#​2498).
• Fixed integer fast-path overflows and compound-assignment spec divergences (#​2497).
• Updated the Test262 suite and fixed promise-combinator handling of non-thenables (#​2500).

⚠️ Upgrading from 4.9.2 or earlier

4.10.0 contains no new breaking changes, but if you skip past 4.9.3 note its host-side breaking change: Error.prototype.stack became a get/set accessor on %Error.prototype% (it is no longer an own property of each error instance), so host code reading the trace via ObjectInstance.TryGetValue("stack", …) now gets undefined — use errorObject.Get("stack") instead. See the v4.9.3 release notes for details (#​2489).

---

What's Changed

• Bump the all-dependencies group with 4 updates by @​dependabot[bot] in Bump the all-dependencies group with 4 updates sebastienros/jint#2491
• Fix completion value clobbered by re-entrant Evaluate() during module execution by @​lahma in Fix completion value clobbered by re-entrant Evaluate() during module execution sebastienros/jint#2493
• Fix runtime type member writes for CLR wrappers by @​nkgotcode in Fix runtime type member writes for CLR wrappers sebastienros/jint#2496
• Fix integer fast path overflows and compound assignment spec divergences by @​lahma in Fix integer fast path overflows and compound assignment spec divergences sebastienros/jint#2497
• Fix DefaultTypeConverter.Convert bypassing subclass TryConvert overrides by @​lahma in Fix DefaultTypeConverter.Convert bypassing subclass TryConvert overrides sebastienros/jint#2498
• Store function-local numbers unboxed in environment slot bindings by @​lahma in Store function-local numbers unboxed in environment slot bindings sebastienros/jint#2499
• Update test262 suite and fix promise combinator non-thenable handling by @​lahma in Update test262 suite and fix promise combinator non-thenable handling sebastienros/jint#2500
• Parenthesize expressions to correctly pre-allocate List<T> by @​jnyrup in Parenthesize expressions to correctly pre-allocate List<T> sebastienros/jint#2501
• Skip FunctionDeclarationInstantiation entirely when there is nothing to do by @​lahma in Skip FunctionDeclarationInstantiation entirely when there is nothing to do sebastienros/jint#2502
• Add compilation cache for repeated eval and new Function sources by @​lahma in Add compilation cache for repeated eval and new Function sources sebastienros/jint#2503
• Fix prepared scripts executing slower than re-parsed source by @​lahma in Fix prepared scripts executing slower than re-parsed source sebastienros/jint#2504
• Return zero-copy views from large slice/substring/substr results by @​lahma in Return zero-copy views from large slice/substring/substr results sebastienros/jint#2506
  ... (truncated)

Commits viewable in compare view.

Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting @dependabot rebase.

---

Dependabot commands and options

You can trigger Dependabot actions by commenting on this PR:

• @dependabot rebase will rebase this PR
• @dependabot recreate will recreate this PR, overwriting any edits that have been made to it
• @dependabot show <dependency name> ignore conditions will show all of the ignore conditions of the specified dependency
• @dependabot ignore this major version will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this minor version will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this dependency will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)