std.math performance (SSE vs. real)

[Alex_Dovhal via Digitalmars-d]

On Saturday, 28 June 2014 at 10:42:19 UTC, Walter Bright wrote:
> It happens with both numerical integration and inverting 
> matrices. Inverting matrices is commonplace for solving N 
> equations with N unknowns.
>
> Errors accumulate very rapidly and easily overwhelm the 
> significance of the answer.

if one wants better precision with solving linear equation he/she
at least would use QR-decomposition.