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resonantdsp / SwankyAmp

Tube amplifier simulation
GNU General Public License v3.0
147 stars 12 forks source link

Using -ftz 2 when compiling Faust DSP code is not really needed #38

Open sletz opened 3 years ago

sletz commented 3 years ago

Very interesting project, bravo ! Faust developer here, one remark: AFAICS you don't need to add the -ftz 2 option when compiling DSP to C++. The point is that when deploying native code, the FTZ will be done at hardware level (this is done automatically by JUCE in the audio thread AFAICS) and will be much better and faster. The -ftz xx option in the Faust compiler has been developed to be used when compiling to WebAssemby, where hardware FTZ does not exits. And we know that this software-ftz xx is even not perfect.

sletz commented 3 years ago

Since the DSP code is quite CPU heavy, optimising the Faust code with techniques explained here could possibly help.