Issue with Compilation Optimization Option in Sigma Studio 4.7

pjs Question

Apr 15, 2026 00:00

Dear Support Team,

I encountered an issue with the compilation optimization option in Sigma Studio 4.7 and would like to seek your advice.

Here is the situation:

I am using a simple example (the project file is attached).

I enabled the optimization option: "Reduce the size of DM1 and DM0 download packets by removing zero initializations".

After the first compilation, the code size decreased from 942 (defined by BufferSize_IC_1 in defines.h) to 940.

However, without changing any settings, after recompiling and exporting the file again, the code size increased to 992.

Could you please explain why this happens? Does this affect the runtime behavior or functionality of the project? Is the optimization option unstable, or do caching or other configuration changes affect the second compilation result?

Thank you for your help.

Best regards,

Pjs
5554.test.dspproj

software

Optimization Option

processors and dsp

sigmastudio

Sigma studio4.7

Processors and Microcontrollers

adau1466

5554.test.dspproj52.2 KB

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DaveThib Reply

Apr 15, 2026 00:00

Hello Pjs,

You caught me on something I have rarely used!! Thanks for providing an example project. I will have to investigate and possibly ask some of the programming team about this. I will get back to you soon....

Thanks,

Dave T

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pjs Reply

Apr 21, 2026 00:00

Hi Dave,

Thanks for your help. Just wanted to check in — have you had any chance to look into it or hear back from the programming team?

Looking forward to your thoughts.

Best regards,

Pjs

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Cheney Reply

Apr 22, 2026 00:00

Hi, Dave,

I encountered the same problem. Is there any progress so far?

Thanks.

Cheney

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