cmd/compile: 1.15 heap allocations regression when calling Write on os.Stdout [1.15 backport] #41543
Description
@ianlancetaylor requested issue #41474 to be considered for backport to the next 1.15 minor release.
@gopherbot Please open a backport issue for 1.15.
This is an unexpected and unavoidable performance regression in 1.15: using
Writeto write a[]byteforces the[]byteto escape into the heap. That did not happen in 1.14.