{
  "measuredAt": "2026-09-17T21:35:20.483Z",
  "environment": {
    "os": "darwin",
    "osRelease": "25.0.0",
    "cpu": "Apple M3",
    "logicalCpus": 8,
    "browser": "153.0.8010.12",
    "engine": "audio-5.1.10-2",
    "engineBytes": 2646894,
    "origin": "localhost",
    "network": "local loopback; not representative of internet cold download",
    "settings": {
      "bitrateKbps": 192,
      "sampleRate": 44100,
      "channels": 2
    }
  },
  "method": "Synthetic 440 Hz PCM stereo WAV, two sizes, one cold and one warm run each. Not perceptual quality evidence. Memory not measured. No real mobile data.",
  "results": [
    {
      "sizeMiB": 25,
      "cache": "cold",
      "inputBytes": 26210382,
      "inputSha256": "fd2c1ac5f5baed75634df977aeb9c19998fdbffd72fc8eb18072daf43b4020b2",
      "durationSeconds": 148.58448979591836,
      "elapsedMs": 1412,
      "error": null,
      "output": {
        "programs": [],
        "stream_groups": [],
        "streams": [
          {
            "codec_name": "mp3",
            "sample_rate": "44100",
            "channels": 2
          }
        ],
        "format": {
          "duration": "148.610612",
          "size": "3567325",
          "bit_rate": "192036"
        }
      },
      "events": [
        {
          "event": "web_vital",
          "properties": {
            "metric": "FCP",
            "value": 84
          }
        },
        {
          "event": "web_vital",
          "properties": {
            "metric": "TTFB",
            "value": 7
          }
        },
        {
          "event": "file_selected",
          "properties": {
            "tool": "wav-to-mp3",
            "input_mb_bucket": "10-25"
          }
        },
        {
          "event": "conversion_started",
          "properties": {
            "tool": "wav-to-mp3",
            "input_mb_bucket": "10-25"
          }
        },
        {
          "event": "web_vital",
          "properties": {
            "metric": "LCP",
            "value": 84
          }
        },
        {
          "event": "web_vital",
          "properties": {
            "metric": "FID",
            "value": 4
          }
        },
        {
          "event": "conversion_completed",
          "properties": {
            "tool": "wav-to-mp3",
            "duration_ms": 880,
            "output_mb_bucket": "1-10"
          }
        },
        {
          "event": "download_started",
          "properties": {
            "tool": "wav-to-mp3"
          }
        }
      ]
    },
    {
      "sizeMiB": 25,
      "cache": "warm",
      "inputBytes": 26210382,
      "inputSha256": "fd2c1ac5f5baed75634df977aeb9c19998fdbffd72fc8eb18072daf43b4020b2",
      "durationSeconds": 148.58448979591836,
      "elapsedMs": 1347,
      "error": null,
      "output": {
        "programs": [],
        "stream_groups": [],
        "streams": [
          {
            "codec_name": "mp3",
            "sample_rate": "44100",
            "channels": 2
          }
        ],
        "format": {
          "duration": "148.610612",
          "size": "3567325",
          "bit_rate": "192036"
        }
      },
      "events": [
        {
          "event": "file_selected",
          "properties": {
            "tool": "wav-to-mp3",
            "input_mb_bucket": "10-25"
          }
        },
        {
          "event": "conversion_started",
          "properties": {
            "tool": "wav-to-mp3",
            "input_mb_bucket": "10-25"
          }
        },
        {
          "event": "web_vital",
          "properties": {
            "metric": "LCP",
            "value": 24
          }
        },
        {
          "event": "web_vital",
          "properties": {
            "metric": "FID",
            "value": 1
          }
        },
        {
          "event": "conversion_completed",
          "properties": {
            "tool": "wav-to-mp3",
            "duration_ms": 891,
            "output_mb_bucket": "1-10"
          }
        },
        {
          "event": "download_started",
          "properties": {
            "tool": "wav-to-mp3"
          }
        }
      ]
    },
    {
      "sizeMiB": 100,
      "cache": "cold",
      "inputBytes": 104853582,
      "inputSha256": "f7c4b10a0ce9ca1137ae63668a4ca5b759369ddff22b4843572904a02455740b",
      "durationSeconds": 594.407619047619,
      "elapsedMs": 3857,
      "error": null,
      "output": {
        "programs": [],
        "stream_groups": [],
        "streams": [
          {
            "codec_name": "mp3",
            "sample_rate": "44100",
            "channels": 2
          }
        ],
        "format": {
          "duration": "594.442449",
          "size": "14267289",
          "bit_rate": "192009"
        }
      },
      "events": [
        {
          "event": "web_vital",
          "properties": {
            "metric": "FCP",
            "value": 32
          }
        },
        {
          "event": "web_vital",
          "properties": {
            "metric": "TTFB",
            "value": 2.299999952316284
          }
        },
        {
          "event": "file_selected",
          "properties": {
            "tool": "wav-to-mp3",
            "input_mb_bucket": "50-100+"
          }
        },
        {
          "event": "conversion_started",
          "properties": {
            "tool": "wav-to-mp3",
            "input_mb_bucket": "50-100+"
          }
        },
        {
          "event": "web_vital",
          "properties": {
            "metric": "LCP",
            "value": 32
          }
        },
        {
          "event": "web_vital",
          "properties": {
            "metric": "FID",
            "value": 0.6999999284744263
          }
        },
        {
          "event": "conversion_completed",
          "properties": {
            "tool": "wav-to-mp3",
            "duration_ms": 3349,
            "output_mb_bucket": "10-25"
          }
        },
        {
          "event": "download_started",
          "properties": {
            "tool": "wav-to-mp3"
          }
        }
      ]
    },
    {
      "sizeMiB": 100,
      "cache": "warm",
      "inputBytes": 104853582,
      "inputSha256": "f7c4b10a0ce9ca1137ae63668a4ca5b759369ddff22b4843572904a02455740b",
      "durationSeconds": 594.407619047619,
      "elapsedMs": 3842,
      "error": null,
      "output": {
        "programs": [],
        "stream_groups": [],
        "streams": [
          {
            "codec_name": "mp3",
            "sample_rate": "44100",
            "channels": 2
          }
        ],
        "format": {
          "duration": "594.442449",
          "size": "14267289",
          "bit_rate": "192009"
        }
      },
      "events": [
        {
          "event": "file_selected",
          "properties": {
            "tool": "wav-to-mp3",
            "input_mb_bucket": "50-100+"
          }
        },
        {
          "event": "conversion_started",
          "properties": {
            "tool": "wav-to-mp3",
            "input_mb_bucket": "50-100+"
          }
        },
        {
          "event": "web_vital",
          "properties": {
            "metric": "LCP",
            "value": 28
          }
        },
        {
          "event": "web_vital",
          "properties": {
            "metric": "FID",
            "value": 0.5
          }
        },
        {
          "event": "conversion_completed",
          "properties": {
            "tool": "wav-to-mp3",
            "duration_ms": 3481,
            "output_mb_bucket": "10-25"
          }
        },
        {
          "event": "download_started",
          "properties": {
            "tool": "wav-to-mp3"
          }
        }
      ]
    }
  ]
}