kllrnohj

1036 ms·

3151.
by kllrnohj 9y ago
You could use sleep, sure, but then you require a seperate thread for every delayed message, which is a whole different ball of not-fun. Otherwise what actually happens when you do a postDelayed(func, delay) is it immediately is translated
3152.
by kllrnohj 9y ago
> All of the memory you describe for other purposes is allocated at user level and booked to processes. No, they aren't. A microkernel is responsibe for basic thread management and IPC. Both of which are highly dynamic in nature. Yo
3153.
by kllrnohj 9y ago
I meant time-delayed. Eg, run this in 10ms type of thing. How else would you do things like exponential backoff?
3154.
by kllrnohj 9y ago
> Microkernels don't need memory management. Of course they do. It takes memory to hold metadata about a process. It takes memory to hold resources about other services. It takes memory to pass data between them. Just because that m
3155.
by kllrnohj 9y ago
C++ has far more to offer over C than just template metaprogramming. Basic memory management and error handling, for example, are radically easier and less error prone in C++ than in C. Less reliance on macros and goto's should be pret
3156.
by kllrnohj 9y ago
clock_gettime is extremely heavily used by nearly everything. Any form of work queue that supports delayed work, for example, is sitting on clock_gettime. Any form of media uses it heavily, as does self-monitoring to look for performance re
3157.
by kllrnohj 9y ago
They did start with an existing one: "Zircon was born as a branch of LK" - https://fuchsia.googlesource.com/zircon/+/HEAD/docs/zx_and_l...
3158.
by kllrnohj 9y ago
Speculation, granted, but the borrow checker is non-trivial compiler complexity, along with more smarts generally shoved into the compiler like type inferencing and the macro system.
3159.
by kllrnohj 9y ago
> IMHO the fact that the spec is so complex that it is near impossible to implement it correctly should be a big hint, yet people seem very eager to continually stuff more features into the language, which can interact with all the other
3160.
by kllrnohj 9y ago
That's a pretty textbook example of cherry-picked data. Why did they look at "gun murders per capita" specifically instead of just "murders per capita"? I don't know about you but I don't particularly care
3161.
by kllrnohj 9y ago
> Apple has been gaining on Intel while both have been improving. Have they really, though? What lines are actually crossing? Intel's mobile CPUs have continued to shed power, so how much of this is actually Apple "catching up&
3162.
by kllrnohj 9y ago
> Because the vast majority of them are sitting idle waiting for interaction tasks, like on your system now. My dual Xeon E5-2690 v4 regularly loads all its cores and benefits greatly from them, but keep making assumptions by all means.
3163.
by kllrnohj 9y ago
> The current A11 chips for iPhones are within 10% of Intel's top mobile chips on Geekbench No, they aren't. iPhone X's multithreaded geekbench score is 10k. The 15" macbook pro is 15k. That's a lot more than 10%
3164.
by kllrnohj 9y ago
A 6-core CPU beat a 2-core one in a perfectly scaling multithreaded benchmark? That's just shocking ! Truly, that is definitely, unquestionably, beyond any doubt representative of what a battle at the workstation level would be. But m
3165.
by kllrnohj 9y ago
Rust's combination of no GC, unsafe escape hatch, and zero-cost C ABI FFI (both function calls and struct layouts) are among its biggest technically differentiating factors. The FFI story seems to be overshadowed, but if you want to us
3166.
by kllrnohj 9y ago
The system partition is simply the factory image, nothing more nothing less. It doesn't inherently mean privileged, either. There's 2 different app locations in the system partition, 1 for real system apps with system privileges (
3167.
by kllrnohj 9y ago
Conceptually yes, but note that in Linux there is no such thing as a thread. Only processes. Some of those processes happen to share an address space and belong to a thread-group (TGID), but they are all processes. This only really matters
3168.
by kllrnohj 9y ago
1 instruction != 1 clock cycle. In particular that would utterly kill the usage of unique_ptr on things like small embedded processors or microcontrollers that either lack speculative execution entirely or do not have the level of branch pr
3169.
by kllrnohj 9y ago
int get_value(int* pointer) { return *pointer; } How is a compiler supposed to reject this for undefined behavior? It'd be absurd to demand the compiler someone knows all possible usages for get_value to find if any of them pass a null
3170.
by kllrnohj 9y ago
The generally recommended thing for catching & fixing this is: https://clang.llvm.org/docs/UndefinedBehaviorSanitizer.html CppCon has also had a lot of great talks on UB and why it is what it is, such as https:&#x
3171.
by kllrnohj 9y ago
> For example, any sort of number crunching. That stuff is now feasible, which opens up all kinds of applications. Not really. You're still hamstrung by either being single threaded & time sliced with the UI thread (huzzah for c
3172.
by kllrnohj 9y ago
> (Besides, I'm also somewhat uneasy with accepting that the computing lingua franca will forever be proprietary to Intel, covered by innumerable patents, and backwards compatible to 1978.) Well, x86_64 is actually AMD's creati
3173.
by kllrnohj 9y ago
> Compilers could stop worrying about obscure/old architectures. No they wouldn't. They still need to turn WebAsm/IR into assembly, which is the thing they already do today anyway. Nothing changes for compilers, other than
3174.
by kllrnohj 9y ago
Spec defines any remaining elements to be initialized to 0. You can even do sparse initialization if we're talking C99 here, like so: int array[] = {1, 2, 3, [99] = -1} And you'll get an array of length 100 {1, 2, 3, 0, 0, 0, ...,
3175.
by kllrnohj 9y ago
In the runtime itself: https://android-review.googlesource.com/c/platform/art/+/580... CL is abandoned but it appears to have just be split up into smaller changes, so that should still give a good idea
3176.
by kllrnohj 9y ago
Or even CPUs & GPUs also power-gate chunks of their internal features. A CPU's power draw at a given voltage & frequency is not fixed. It depends on the actual instructions being executed. Taken to the extreme you end up with t
3177.
by kllrnohj 9y ago
> There is some analysis that Android, from a business perspective, did not work out all that well for Google. Google is the default service provider and owner of the world's largest OS and that somehow is something that "didn&
3178.
by kllrnohj 9y ago
> How about you start showing me the apps that are actually draining my phone's battery, and stop allowing them to hide behind Android OS and System. Nobody is "allowed" to hide. It's simply an estimate based on a cru
3179.
by kllrnohj 9y ago
> after 3 years because the vendor stops giving security updates for its software? This should be illegal. Feature updates stopped, security updates did not. The phones are still receiving monthly security patches and will continue t
3180.
by kllrnohj 9y ago
Think of all the places where you need to pass in an explicit type to a Java class to workaround the fact that the types are erased (list.toArray() being the canonical example, but reflection uses hit this a lot as well). That's the do

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