[7.x] Introduce faster approximate sinh/atan math functions (#49009) #49110
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This commit introduces a new class called ESSloppyMath that is meant to reflect the purpose of Lucene's SloppyMath, but add additional unimplemented faster alternatives to math functions. The two that are used by geotile-grid a lot are sinh/atan. In a quick elasticsearch rally benchmark for geotile-grid on Switzerland data points, this shows a (1.22x) 22% speed-up over using Math's functions. closes elastic#41166.
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Backport of #49009.
This commit introduces a new class called ESSloppyMath
that is meant to reflect the purpose of Lucene's SloppyMath,
but add additional unimplemented faster alternatives to math functions.
The two that are used by geotile-grid a lot are sinh/atan.
In a quick elasticsearch rally benchmark for geotile-grid on Switzerland
data points, this shows a (1.22x) 22% speed-up over using Math's functions.
closes #41166.