Hi,

sorry if this is a dumb question, but the Release Notes for go 1.15 have 
the Note:
The compiler's -json optimization logging now reports large (>= 128 byte) 
copies and includes explanations of escape analysis decisions. 

But I didn't find anything about "-json" as a flag for go build or similar 
and google dind't yield anything for go compiler json optimization logging 
or similar.

Can anyone clarify what this json optimiziation logging is and how it can 
be used/invoked ? 

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