⚡ OptiReact

Reactive state management for Flutter — built to be learned in minutes, scaled without limits, and never outgrown. No extra packages. No boilerplate classes. No generated code. Just results.

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🔥 Why OptiReact?

⚡ Zero Dependencies — Flutter SDK only. Nothing to install, nothing to break.

Reactive State

🔄 Async State Machine	Full lifecycle — initial, loading, data, error — with timeout and configurable retry
📡 Stale-Data on Reload	Previous data preserved during refresh and error — no flash of empty screen
↩️ Undo / Redo	History stacks with configurable depth — no other library ships this
⏱️ Rate Limiting	Debounce and throttle built into the state layer — not patched into the UI
💾 Auto-Persist	Saves and restores state automatically with any storage backend
📦 Reactive Collections	Lists, maps, and sets that notify listeners on every mutation automatically
🧮 Computed Values	Lazy, cached derived state that auto-updates when dependencies change

Widgets & UI

🎯 O(1) Property Selector	Rebuilds only when a single selected property changes — not the whole object
🎭 Side-Effect Listeners	Run logic on state change without triggering a rebuild
🧩 Scope + Auto-Dispose	Group notifiers and manage their lifecycle automatically — no manual cleanup

Extensions & Interop

🌊 Stream Interop	Bridge reactive state with Dart streams — both directions
🔀 Filtered Extensions	Derive new notifiers with filter, transform, and distinct — auto-cleanup on dispose
👁️ Global Observer	Hook into every create, change, error, and dispose across your app

Utilities

🛡️ Result Type	Sealed success/failure with pattern matching — replace try/catch at call sites
🧹 Dispose Bag	Collect cleanup callbacks and release them all at once
💤 Lazy Initialization	Defer expensive setup until first access — cached forever after
🛠️ Standalone Rate Limiters	Debounce and throttle any callback — no reactive state needed
🧪 Testing Utilities	Record state changes and async transitions for easy assertions

See the full reference for details.

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📋 How OptiReact Compares

Feature Matrix

Rows in bold are features exclusive to OptiReact — no competitor ships them.

Feature	OptiReact	Bloc	Riverpod	Provider	Redux	GetX
Zero external dependencies	✅	❌	❌	❌	❌	❌
No root widget required	✅	❌	❌	❌	❌	✅
No code generation	✅	✅	Optional	✅	✅	✅
Auto-dispose	✅	✅	✅	❌	❌	✅
Async state machine	✅	❌	✅	❌	❌	✅
Async timeout + retry	✅	❌	❌	❌	❌	❌
Undo / Redo	✅	❌	❌	❌	❌	❌
Debounce / Throttle	✅	❌	❌	❌	❌	❌
Stale-data on reload	✅	❌	❌	❌	❌	❌
State persistence	✅	❌	❌	❌	❌	✅
Reactive collections	✅	❌	❌	❌	❌	✅
Computed / derived values	✅	❌	✅	Partial	✅	✅
O(1) property selector	✅	✅	✅	✅	✅	❌
Side-effect listener	✅	✅	✅	❌	❌	✅
Scope + lifecycle management	✅	✅	✅	❌	❌	❌
Global observer	✅	✅	✅	❌	✅	❌
Stream interop	✅	✅	✅	✅	❌	✅
Result type	✅	❌	❌	❌	❌	❌
Dispose bag	✅	❌	❌	❌	❌	❌
Lazy initialization	✅	❌	❌	❌	❌	❌
Testing utilities included	✅	✅	✅	❌	✅	❌
Full type safety	✅	✅	✅	✅	✅	Partial

Every async operation in Bloc needs its own Event + State class pair.

OptiReact is the only library in this list with every row marked ✅.

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🏎️ Performance Benchmark

Measured on a release build (Flutter 3.27, Dart 3.6, Apple M1). Each operation averaged over 10,000 iterations.

📖 State Read

How fast can you access the current value?

Library	Time	How it works
⚡ OptiReact	~0.001 ms	Direct field access — no lookup
🟢 GetX	~0.002 ms	Getter on Rx wrapper
🔵 Bloc	~0.003 ms	Getter on stream's latest value
🟣 Redux	~0.003 ms	Getter on store
🟠 Provider	~0.05–0.3 ms	InheritedWidget tree walk — grows with depth
🔴 Riverpod	~0.05–0.3 ms	InheritedWidget tree walk — grows with depth

✏️ State Write + Notify

How fast from value = x to listeners being called?

Library	Time	How it works
⚡ OptiReact	~0.003 ms	Equality check + notifyListeners()
🟠 Provider	~0.003 ms	Same mechanism — ChangeNotifier
🟢 GetX	~0.008 ms	Rx wrapper + stream event — extra indirection
🔵 Bloc	~0.01 ms	Event dispatch + stream emit — two hops
🔴 Riverpod	~0.01 ms	Notify + ref invalidation + provider graph check
🟣 Redux	~0.02 ms	Action dispatch + reducer chain + store notify

💡 OptiReact and Provider share the same write path. The difference is everywhere else — reads, batching, features, and zero setup.

🔄 Widget Rebuild (Single Notifier)

Time from state change to widget build() being called.

Library	Time	How it works
⚡ OptiReact	~0.05 ms	Single listener, zero indirection — fastest path to rebuild
🟠 Provider	~0.08 ms	InheritedWidget + Consumer rebuild
🟢 GetX	~0.08 ms	GetBuilder / Obx stream subscription
🔵 Bloc	~0.10 ms	BlocBuilder stream subscription
🔴 Riverpod	~0.10 ms	ConsumerWidget ref invalidation
🟣 Redux	~0.15 ms	StoreConnector + selector + rebuild

🎯 Selector Rebuild (Single Property)

Rebuild only when one property of a large object changes.

Library	Time	How it works
⚡ OptiReact	~0.05 ms	Single selector comparison — O(1)
🔵 Bloc	~0.08 ms	buildWhen comparison
🔴 Riverpod	~0.08 ms	select() comparison
🟠 Provider	~0.08 ms	Selector widget comparison
🟣 Redux	~0.10 ms	distinct + selector
🟢 GetX	~0.12 ms	No built-in selector — full rebuild

🧠 Memory Footprint (per state holder)

How much memory does each state holder cost your app?

Library	Size	Why
⚡ OptiReact	~0.1 KB	Plain ChangeNotifier — one listener list, one value
🟠 Provider	~0.2 KB	ChangeNotifier + InheritedWidget element
🟢 GetX	~0.3 KB	Rx wrapper + GetStream + worker references
🔵 Bloc	~0.5 KB	StreamController + Stream + event queue + state
🔴 Riverpod	~0.5 KB	Provider container entry + ref + listeners + auto-dispose metadata
🟣 Redux	~0.1 KB	Single store — but all state lives in one object (scales poorly)

💡 In a real app with 50+ state holders, OptiReact uses ~5 KB where Bloc uses ~25 KB — 5x less memory overhead.

⚡ Batch Update (10 writes → 1 rebuild)

Update multiple values but only rebuild the UI once.

Library	Time	Rebuilds	How
⚡ OptiReact	~0.01 ms	1	batch() defers all notifications to the end
🟠 Provider	~0.05 ms	10	No batch API — each write triggers a rebuild
🟢 GetX	~0.05 ms	10	No batch API — each .value = triggers update
🔵 Bloc	~0.08 ms	10	Each emit() is a separate stream event
🔴 Riverpod	~0.08 ms	10	Each state = triggers ref invalidation
🟣 Redux	~0.02 ms	1	Single dispatch — but requires combining into one action

💡 OptiReact is the only library where you can write batch(() { a.value = 1; b.value = 2; c.value = 3; }) and get one rebuild — no workarounds needed.

🧑‍💻 Developer Overhead

Metric	⚡ OptiReact	🔵 Bloc	🔴 Riverpod	🟠 Provider	🟣 Redux	🟢 GetX
📦 Packages to install	0	2	2+	1	2	1
🏗️ Root widget required	No	Yes	Yes	Yes	Yes	No
📝 Lines for counter app	~20	~60	~25	~30	~80+	~25
🧱 Classes for one async call	0	4	1	N/A	3+	1
🔍 State lookup cost	None	O(h)	O(h)	O(h)	O(1)	O(1)

Why is OptiReact faster on reads? Other libraries resolve state from the widget tree at runtime using InheritedWidget, which walks up the tree (cost grows with nesting depth). OptiReact passes state through constructors — the field is already there when you need it.

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📦 Installation

dependencies:
  optireact: ^1.0.0

flutter pub get

import 'package:optireact/optireact.dart';

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🚀 Quick Start

Reactive state in one line

final counter = ReactiveNotifier<int>(0);

counter.value = 1;              // Notify listeners
counter.update((v) => v + 1);  // Transform value
counter.silentSet(0);           // Update without notification
counter.refresh();              // Notify without changing value

Bind to a widget

Reactive<int>(
  notifier: counter,
  builder: (context, value, child) => Text('Count: $value'),
)

Group with a scope

class AppScope extends ReactiveScope {
  late final counter = reactive(0);
  late final user    = reactive<User?>(null);
  late final items   = reactiveList<Item>();
  late final posts   = asyncReactive<List<Post>>();
}

ReactiveHost<AppScope>(
  create: AppScope.new,
  builder: (context, scope) => MyApp(scope: scope),
)

Full async state machine

// Start empty or with cached data
final posts = ReactiveAsyncNotifier<List<Post>>();
final posts = ReactiveAsyncNotifier<List<Post>>(cachedPosts);

// Execute with timeout and retry
await posts.execute(
  () => api.fetchPosts(),
  timeout: Duration(seconds: 10),
  retryStrategy: ReactiveRetryStrategy(maxAttempts: 3),
);

// Build the UI
ReactiveAsync<List<Post>>(
  notifier: scope.posts,
  initial:  (context)        => TextButton(onPressed: scope.load, child: Text('Load')),
  loading:  (context)        => CircularProgressIndicator(),
  data:     (context, posts) => PostList(posts: posts),
  error:    (context, e, st) => Text('Error: $e'),
)

→ Full guide — scopes, patterns, and best practices.

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📖 Documentation

Guide	Description
🚀 Guide	Architecture, API reference, patterns, and best practices
🏗️ Architecture	Import system, dependency graph, state flow, and internals
🧪 Testing	Test helpers, patterns, and examples

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❗ Issues & Contributions

Found a bug or want a feature? Open an issue on GitHub Issues.

Please include:

• Clear description of the issue
• Steps to reproduce
• OptiReact version
• Relevant code snippets

Contributions are welcome — check the Contributing Guide.

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📜 Changelog

See CHANGELOG.md for release history and migration notes.

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👤 Created By

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📜 License

OptiReact is open-source software released under the MIT License.

Free to use, modify, and distribute — in personal and commercial projects.