<br><br>><br>> And what do these numbers look like? Do they repeat? Are they short?<br><br>Right as in example csv. It is trading data.<br><br>> Or are they high-precision and varying wildly in order of magnitude,<br>
> and widely distributed statistically?<br><br><br>They are very close to each other and vary not more than several percents. You think ot is a good place for optimization?<br><br><br>In fact I have achieved good enough results: less than a second and thank to all community for it.<br>
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