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NSOperation vs Grand Central Dispatch
...down of these NSOperations was accounting for a significant portion of the CPU cycles in the running application, and was slowing things down. I replaced these with simple blocks and a GCD serial queue, and that overhead disappeared, leading to noticeably better rendering performance. This wasn't th...
Why does this code using random strings print “hello world”?
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I'll just leave it here. Whoever has a lot of (CPU) time to spare, feel free to experiment :) Also, if you have mastered some fork-join-fu to make this thing burn all CPU cores (just threads are boring, right?), please share your code. I would greatly appreciate it.
publ...
Async/Await vs Threads
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Worth mentioning await Task.Run for cpu-bound work. If I understand correctly, that sometimes accomplishes what one would otherwise create a thread, or a background worker, to do.
– ToolmakerSteve
Jun 27 '18 at 5:26
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What is Turing Complete?
... together to allow for all of those nice things that you mention. E.g. the CPU produces "tape" for the GPU to read so that it can write "tape" for the monitor so that the monitor can write "tape" to the user. Likewise, the CPU could produce "tape" for the hard drives, NICs, sound cards, etc.
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How are everyday machines programmed?
...have 8 or 16 pins on the chip - compared to scores of pins in your regular CPU socket.
So the workflow is write some code (say, in C), compile it on your desktop machine. That compiler generates machine code for the embedded chip. Then that code is loaded onto the microprocessor (and you need speci...
Is Java really slow?
...time compiled programs can't tweak their code in real-time to the specific CPU & system they're running on. JIT provides some very efficient loop transformations this way.
A couple of other historical facts contributed to the "Java is slow" reputation:
Before JIT compilation (Java 1.2/1.3), ...
Why is IntelliJ 13 IDEA so slow after upgrading from version 12?
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Disabling the subversion plugin took my cpu down from 100% to less than 2%. If your IntelliJ 13 is slow it is probably a plugin, this should be the accepted answer.
– pllee
Jun 6 '14 at 15:22
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CruiseControl.Net 进行持续化集成 - IT产品资讯 - 清泛网 - 专注C/C++及内核技术
...ver服务，在启动之前，需要先解决一下可能最影响情绪的问题：我们知道windows services默认情况下是用本地系统账户运行的，可一般情况下我们会在当前操作用户下设置对vss共享目录的访问权限，比如当前windows运行账户为administra...
Do any JVM's JIT compilers generate code that uses vectorized floating point instructions?
...java -jar javacpp.jar Dot.java -exec
With an Intel(R) Core(TM) i7-7700HQ CPU @ 2.80GHz, Fedora 30, GCC 9.1.1, and OpenJDK 8 or 11, I get this kind of output:
dot(): 39 ns
dotc(): 16 ns
Or roughly 2.4 times faster. We need to use direct NIO buffers instead of arrays, but HotSpot can access direc...
Is there a way to iterate over a range of integers?
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Debating the runtime performance of nanosecond CPU operations, while common in Goland, seems silly to me. I'd consider that a very distant last consideration, after readability. Even if CPU performance were relevant, the contents of the for loop will almost always swamp w...