perf_log library

Render-path diagnostic trace for the viewer.

UNSTABLE diagnostics surface with no semver guarantee - deliberately not exported from package:dart_pdf_editor/dart_pdf_editor.dart, mirroring package:pdf_cos/perf.dart.

Kept a separate entry point so a host can flip the trace on (and install a PdfPerfLog.sink) from code that must stay out of the editor's own loading unit - the app's main.dart runs before its deferred app.dart split, and importing the package entry there would pull the whole editor stack into the initial web download.

Classes

PdfPerfLog

Lightweight, frame-gated performance log for diagnosing scroll/render hangs on heavy documents.

PdfRasterProbe

Measures one rasterize call: its wall duration AND how many rasters were in flight alongside it.