unsafe cgo (fastcgo)

[MatejMagat305]

there is any plan to make oficial "unsafe cgo" (fastgo) like https://github.com/petermattis/fastcgo (which is much faster then normal cgo and more like call native go function) like tool or package or additon to unsafe package?
(maybe similar unsafe.fastCgo(c.somefn, ...args) or fastcgo.Call1Arg(c.somefn1, arg); fastcgo.Call2Arg(c.somefn2, arg1, arg2); ....)
I know it wil be unsafe and maybe sometime risk but it would be very usefull in some case when people need realy fast call cgo.

[mvdan]

It seems to be faster due to severe tradeoffs:

WARNING: No attempt is made to play nice with the Go scheduler or GC. The goroutine executing a fastcgo call will never be interrupted and will delay the starting or completion of GC until it finishes.

I think you should just follow #19574, as I don't think splitting the discussion in two is worthwhile.

it would be very usefull in some case

Also see https://golang.org/doc/faq#x_in_std.

[mdlayher]

See above, closing.