gspencergoog 18f0d3aef7 Add framework support for system text scale factor. (#12180)
* Add framework-side support for system text scale factor.

* Rolling engine to e3404b81a53ba3180c7623a6f2190ebb28518f30
  Additional changes rolled in with engine change:
    libtxt: implementation of GetRectsForRange that processes a line at a time - e3404b8
    Provide an entropy source to the Dart engine (#4161) - e1aa867
    libtxt: search for fallback fonts that can match emoji and CJK characters - 8061df1
    Roll skia to e4679fa06a. (#4157) - 267e7a8
    Update buildroot to 53fea9aebbcc39c6522731471a1a45960ee0685e (#4160) - 02ea7ae
    Revert engine Dart roll. (#4158) - 14aab33
    Add support for system text scale factor. (#4124) - b2a7f4b
    Include _http into sky_engine libraries for analyzer (#4154) - b930f10
    libtxt: Remove postprocess_line and improve tracking of X offsets - 86f95f0
    libtxt: remove redundant line_widths (#4152) - 14bf515
    Roll dart to ade37f931e90b0fdb8fe16d6bf6f089545da55b6 (#4151) - 6f1264f
2017-10-02 14:18:18 -07:00
..

complex_layout

Scrolling benchmark

To run the scrolling benchmark on a device:

flutter drive --profile test_driver/scroll_perf.dart

Results should be in the file build/complex_layout_scroll_perf.timeline_summary.json.

More detailed logs should be in build/complex_layout_scroll_perf.timeline.json.

Startup benchmark

To measure startup time on a device:

flutter run --profile --trace-startup

Results should be in the logs.

Additional results should be in the file build/start_up_info.json.