flutter_startup_tracer 0.1.0

Measure Flutter app startup from process start to first frame and interactive, with an ASCII waterfall, DevTools timeline events and actionable advice.

0.1.0

• First release.
• StartupTracer.start() records Dart main as t0; phase, phaseSync, parallel (wall time vs sum) and nested phases via zones.
• StartupTracerScope / trace.runApp() capture runApp, first frame built and first frame rasterized (engine FrameTiming), and start deferred tasks after it.
• markInteractive() and mark() for app-defined milestones.
• Optional native process-start time: Android Process.getStart(Requested)ElapsedRealtime, iOS sysctl(KERN_PROC_PID) with pre-warm detection. Unknown elsewhere.
• dart:developer timeline events for DevTools.
• Reports as console text with an ASCII waterfall, Markdown and JSON, plus advice: slow critical phases, serial phases that could run in parallel, heavy first build, slow native start, pre-warming, failed phases and debug-mode measurements.
• StartupTracerBanner overlay, onReport callback and in-memory history.