Viewing profile — cafxx

Filed a CL for this, hopefully it gets merged ~soon. https://go-review.googlesource.com/c/go/+/729920

That's not how it's implemented (it returns false if you're inside a Do() on a unsupported platform), although I agree the wording should be clearer.

I find this example mildly infuriating/amusing: func Encrypt(message []byte) ([]byte, error) { var ciphertext []byte var encErr error secret.Do(func() { // ... }) return ciphertext…

The point is that no-one is thinking to add knobs, or allow alternative GCs.

> GOGC was introduced in Go 1.5 yes, that's quite literally what I meant by "GOGC has always been there". 1.5 was released 10 years ago, just 3 years after 1.0. So to summarize: th…

Your previous message was referring to Go "getting" knobs, but GOGC has always been there. The older GC algorithm won't stay, IIRC the plan is for it to be removed in 1.27 (it's ke…

I still would be wary, even in that case. Go does not guarantee that the address of an allocation won't change over the lifetime of the allocation (although current implementations…

Not sure what you are referring to. There are no knobs involved in the things I mentioned (aside from the one to enable the experiment, but that's just temporary until the experime…

> If you really want an arena like behavior you could allocate a byte slice and use unsafe to cast it to literally any type. A word of caution. If you do this and then you store po…

There's a bunch of activity ongoing to make things better for memory allocation/collection in Go. GreenTeaGC is one that has already landed, but there are others like the RuntimeFr…

I think that the idea of not initiating writeback immediately derives mostly from the days of spinning rust, where read latencies would be noticeably impacted if you initiated writ…

mgo builds the same program once for each GOAMD64 variant, and then bundles all of them with a launcher that at runtime picks the correct one for the local system. Handy if you hav…

Would be nice also if they fixed the ubiquitous "network errors" that happen approximately every single time...

Not to be the devil's advocate here, but almost certainly it can be the case that data was used to define heuristics (potentially using automated statistical methods) that a engine…

...or maybe Windows should just offer an API for marking a file for deletion once it's not in use anymore (I understand unlink semantics may not be possible, but that's not what my…

Or you could simply invoke a GC periodically (or every N times a key is removed from the map, or similar schemes). Another simple way, if we don't like the idea of triggering GCs m…

Why not just allocating the blobs off-heap? (That is something you probably want to do anyway if it's cryptographic material, to avoid being at the mercy of the GC leaving copies a…

'Oumuamua was closer to 8:1 https://en.wikipedia.org/wiki/%CA%BBOumuamua

In the example you linked it's comparing two threads reading from the same or separate cache lines, no? If so, that's not really the point I was referring to (as the two variables …

A point that AFAICT is not articulated in the article is why the two cached fields should be in their own dedicated cache line (e.g. why readIdxCached_ can not share the cache line…

Yes, that's the whole point. I did not claim you can control every single module in the QR. I just said that you can get different QR codes for the same semantic content.

Yes, that's what I meant.