MoltenDb Web

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What's New in v2.0.0

Query Builder

• Bulk Delete with .where() — delete documents matching a filter clause without listing individual keys.
• Capped Collections (.maxSize()) — cap a collection to a maximum number of documents; oldest entries are evicted automatically when the limit is reached.
• TTL Collections (.ttl()) — set a time-to-live (in seconds) on a collection; documents are removed automatically after expiry.

Core Engine Performance

• Arc<str> collection-key interning — the outer DashMap key was changed from String to Arc<str>. During bulk insert and WAL replay all documents in the same collection share a single pointer instead of allocating a new String per document. Saves ~30 B per doc (~30 MB at 1 M docs) and reduces allocator pressure during startup.
• MessagePack in-memory storage — the hot document map was switched from serde_json::Value to Box<[u8]> ( MessagePack bytes). Reduces steady-state RSS for 1 M docs from ~4 GB to ~500 MB (~8× lower). Decoding to Value happens lazily on read; write paths encode via rmp_serde.

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Demos

🔬 Interactive Query Demo (Core & Query packages)

Explore the full MoltenDb query builder in a live, zero-setup environment:

• ⚡ **StackBlitz: ** Open Interactive Demo

This demo lets you test the full query builder API — get(), set(), update(), delete(), .where(), .fields(), .sort(), .joins(), and more — directly in the browser against a real WASM-powered MoltenDb instance.

🅰️ Angular Demo App

A real-world Angular application showcasing the @moltendb-web/angular integration:

• 🔗 Demo repo: github.com/maximilian27/moltendb-angular
• ⚡ StackBlitz: Open in StackBlitz
• 🌐 **Live demo: ** moltendb-angular.maximilian-both27.workers.dev/laptops

The demo app showcases two real-world scenarios:

• /laptops — A fully-featured data table with filtering, sorting, column visibility, field projection, and reactive summary stats using moltenDbResource.
• /stress-test — A benchmarking page measuring MoltenDB CRUD performance (bulk writes, reads, filtered/sorted queries, updates, and deletes) displayed as ops/sec.

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Packages

This monorepo contains the following packages. Please refer to their individual READMEs for detailed documentation, usage examples, and API references.

Package	Description	README
@moltendb-web/core	Core WASM engine — low-level database bindings	README
@moltendb-web/query	Query builder — ergonomic API on top of core	README
@moltendb-web/angular	Angular integration — reactive Signals, resources, and DI	README
@moltendb-web/react	React integration — React hooks	README