Incorrect size calculation? about betteralign HOT 5 CLOSED

Thanks a lot!

from betteralign.

@derlaft Report states the amount of object bytes that GC has to scan for pointers. With the following:

type structB struct {
        a net.IP
        b uint8
}

GC would scan first 8 bytes for pointers (net.IP type) and immediately stop upon reaching uint8 type.

from betteralign.

btw is there an article (or anything similar) that I could read about that effect on GC? would be interesting to know more details, but so far cannot find anything

from betteralign.

nvm, found it :) https://cs.opensource.google/go/x/tools/+/refs/tags/v0.9.1:go/analysis/passes/fieldalignment/fieldalignment.go;l=23

from betteralign.

Yes, actually Vincent has an excellent blog series on Golang GC, but it's also mentioned I guess everywhere including official GC Guide.

from betteralign.