flutter_perf_lints 0.1.0

Analyzer plugin that flags Flutter performance problems: undisposed controllers, full-size image decodes, eager lists, animated Opacity and heavy build work.

0.1.0

First release, built on the official Dart analyzer plugin system (analysis_server_plugin, Dart 3.10+).

Rules (all on by default):

• undisposed_controller (warning): controllers, focus nodes, notifiers, stream subscriptions and timers created by a State and never released. Quick fix: release it in dispose() (creating the method if needed).
• image_without_cache_size: Image.network/asset/file/memory without cacheWidth/cacheHeight, and NetworkImage/FileImage/MemoryImage not wrapped in ResizeImage.
• prefer_list_builder: ListView/GridView (and Column/Row directly in a SingleChildScrollView) whose children come from .map(), List.generate or a collection-for. Quick fix for ListView(children: xs.map(...).toList()).
• avoid_animated_opacity_widget: Opacity driven by an animation value or built inside an AnimatedBuilder.
• prefer_riverpod_select: final x = ref.watch(p) where only one property of x is ever read. Quick fix: ref.watch(p.select((v) => v.prop)).
• avoid_setstate_large_subtree: setState in a State whose build is longer than 60 lines or has more than 25 widget constructors.
• avoid_heavy_work_in_build: jsonDecode, RegExp(...), DateFormat(...), NumberFormat(...), .sort() and synchronous file I/O inside build.