Re: [Discuss-gnuradio] ffast-math

[Chris Kuethe]

Yep, on some processors with some workloads it really makes a huge difference. As others have commented, there may be significant trade-offs with regard to numerical behaviro.

Some of my observations:

dump1090 loses accuracy below the 7th digit when calculating precision, but consumes 10% less power on the device under test

rtl_433 runs about 35% faster

and acarsdec runs over 400% faster.

On Sun, Sep 1, 2019, 07:11 Albin Stigö <address@hidden> wrote:

Anyone has experience with the real world impact of using gcc -ffast-math with SDR in general, and GNURadio/Volk in particular?

--Albin SM6WJM

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