Compare Java9 `sqrt()` with `BigDecimalMath.sqrt()`

[eobermuhlner]

Compare Java9 `sqrt()` with `BigDecimalMath.sqrt()`

[eobermuhlner]

I only need a sqrt function - should I use this library?

With Java 9 the BigDecimal class has a new function sqrt(BigDecimal, MathContext).
If you only need the square root function then by all means use the provided standard function instead of this library.

If you need any other high level function then you should still consider using this library.

For high precision (above 300 digits) the current implementation of
Java 9 BigDecimal.sqrt() becomes increasingly slower than BigDecimalMath.sqrt().
You should consider whether the increased performance is worth having an additional dependency.

The following charts shows the time needed to calculate the square root of 3.1 with increasing precision.