Audio processing is very slow

The generation of the waveform display on a new timeline is very slow.
Until the waveform is generated, the audio normalization is also very slow.
Sometimes, even when the waveform is displayed, the normalization remains slow until the background processing of the audio is complete (I assume).
Until the waveform is generated, the audio normalization is also very slow.
Sometimes, even when the waveform is displayed, the normalization remains slow until the background processing of the audio is complete (I assume).