It's expected to take a somewhat arbitrary time.  It reads ASCII.

The start-up time is going to be large because of having to find the first
frequency, which means you have to parse the text nonetheless.


On Sun, Sep 19, 2021, 20:19 Patrick Eriksson <patrick.eriks...@chalmers.se>

> Hi all,
> I have noticed that the time used by ReadHITRAN is not linear with the
> width of the frequency range. For example, to read all lines (of five
> main species) between 800 and 840 cm-1 used 90 s, while reading 800-820
> and 820-840 cm-1) together used 57 s.
> Is this expected?
> (The above uses 1-2% of my RAM).
> Bye,
> Patrick

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