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complex_layout_android__scroll_smoothness generates unexpected numbers #66608

@liyuqian

Description

@liyuqian

Unlike the numbers in #61998 (comment), the test is currently generating something like the following both in the device lab and in my local experiment.

Task result:
{
  "success": true,
  "data": {
    "janky_count_with_resampler_90Hz": 0.0,
    "average_abs_jerk_with_resampler_90Hz": 0.0,
    "dropped_frame_count_with_resampler_90Hz": 43,
    "janky_count_with_resampler_59Hz": 0.0,
    "average_abs_jerk_with_resampler_59Hz": 0.0,
    "dropped_frame_count_with_resampler_59Hz": 28,
    "janky_count_without_resampler_90Hz": 0.0,
    "average_abs_jerk_without_resampler_90Hz": 0.0,
    "dropped_frame_count_without_resampler_90Hz": 36,
    "janky_count_without_resampler_59Hz": 0.0,
    "average_abs_jerk_without_resampler_59Hz": 0.0,
    "dropped_frame_count_without_resampler_59Hz": 29
  },
  "benchmarkScoreKeys": [
    "janky_count_with_resampler_90Hz",
    "average_abs_jerk_with_resampler_90Hz",
    "dropped_frame_count_with_resampler_90Hz",
    "janky_count_with_resampler_59Hz",
    "average_abs_jerk_with_resampler_59Hz",
    "dropped_frame_count_with_resampler_59Hz",
    "janky_count_without_resampler_90Hz",
    "average_abs_jerk_without_resampler_90Hz",
    "dropped_frame_count_without_resampler_90Hz",
    "janky_count_without_resampler_59Hz",
    "average_abs_jerk_without_resampler_59Hz",
    "dropped_frame_count_without_resampler_59Hz"
  ]
}

The problem seems to happen after a48e143

See https://flutter-flutter-perf.skia.org/e/?begin=1599168329&end=1600967051&queries=sub_result%3Daverage_abs_jerk_with_resampler_59Hz%26sub_result%3Daverage_abs_jerk_without_resampler_59Hz%26test%3Dcomplex_layout_android__scroll_smoothness&requestType=0

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    c: regressionIt was better in the past than it is now

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