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UI performance regression #1097

@howff

Description

@howff

I think there's been a UI performance regression somewhere between 3.39 and 3.44. Operations like seeking and single-stepping through frames has a very noticeable delay on 3.44 which wasn't present on 3.39. And I can run the two side-by-side with the same video to verify this. It's not related to any particular video file.

{
  "state": {
    "filePath": "C:\\Users\\arb\\Documents\\2022_04_01_18_00_01.mp4",
    "fileFormat": "mp4",
    "mainStreams": [
      {
        "index": 0,
        "codec_name": "h264",
        "codec_long_name": "H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10",
        "profile": "High",
        "codec_type": "video",
        "codec_tag_string": "avc1",
        "codec_tag": "0x31637661",
        "width": 3840,
        "height": 2160,
        "coded_width": 3840,
        "coded_height": 2160,
        "closed_captions": 0,
        "has_b_frames": 0,
        "sample_aspect_ratio": "1:1",
        "display_aspect_ratio": "16:9",
        "pix_fmt": "yuvj420p",
        "level": 51,
        "color_range": "pc",
        "color_space": "bt470bg",
        "color_transfer": "smpte170m",
        "color_primaries": "bt470bg",
        "chroma_location": "left",
        "refs": 1,
        "is_avc": "true",
        "nal_length_size": "4",
        "r_frame_rate": "30/1",
        "avg_frame_rate": "20491875/683491",
        "time_base": "1/90000",
        "start_pts": 0,
        "start_time": "0.000000",
        "duration_ts": 10935856,
        "duration": "121.509511",
        "bit_rate": "42066075",
        "bits_per_raw_sample": "8",
        "nb_frames": "3643",
        "disposition": {
          "default": 1,
          "dub": 0,
          "original": 0,
          "comment": 0,
          "lyrics": 0,
          "karaoke": 0,
          "forced": 0,
          "hearing_impaired": 0,
          "visual_impaired": 0,
          "clean_effects": 0,
          "attached_pic": 0,
          "timed_thumbnails": 0
        },
        "tags": {
          "rotate": "90",
          "creation_time": "2022-04-01T17:02:04.000000Z",
          "language": "eng",
          "handler_name": "VideoHandle",
          "vendor_id": "[0][0][0][0]"
        },
        "side_data_list": [
          {
            "side_data_type": "Display Matrix",
            "displaymatrix": "\n00000000:            0       65536           0\n00000001:       -65536           0           0\n00000002:            0           0  1073741824\n",
            "rotation": -90
          }
        ]
      }
    ],
    "copyStreamIdsByFile": {
      "C:\\Users\\arb\\Documents\\2022_04_01_18_00_01.mp4": {
        "0": true
      }
    },
    "cutSegments": [
      {}
    ],
    "mainFileFormatData": {
      "filename": "C:\\Users\\arb\\Documents\\2022_04_01_18_00_01.mp4",
      "nb_streams": 1,
      "nb_programs": 0,
      "format_name": "mov,mp4,m4a,3gp,3g2,mj2",
      "format_long_name": "QuickTime / MOV",
      "start_time": "0.000000",
      "duration": "121.511000",
      "size": "639738808",
      "bit_rate": "42118906",
      "probe_score": 100,
      "tags": {
        "major_brand": "mp42",
        "minor_version": "0",
        "compatible_brands": "isommp42",
        "creation_time": "2022-04-01T17:02:04.000000Z",
        "com.android.version": "10"
      }
    },
    "rotation": 360,
    "shortestFlag": false
  },
  "platform": "win32",
  "version": "3.44.0"
}

I might try and find which in version it started, unless you've got some ideas?

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