Calculating the far wings of lines can be a time consuming task. To get the summation of these contributions you need evaluate line shapes out to 25 cm-1 from the line center. Past about 4 cm-1 this behavior becomes Lorentzian in nature and it could be possible to save time on the calculation and at a given threshold switch to a lorentzian.
Time test study
If time savings add in option to use approximation or continue with full HTP support.
Calculating the far wings of lines can be a time consuming task. To get the summation of these contributions you need evaluate line shapes out to 25 cm-1 from the line center. Past about 4 cm-1 this behavior becomes Lorentzian in nature and it could be possible to save time on the calculation and at a given threshold switch to a lorentzian.