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Is System.nanoTime() completely useless?
..., on x86 systems, Java's System.nanoTime() returns the time value using a CPU specific counter. Now consider the following case I use to measure time of a call:
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Why would you use Expression rather than Func?
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@bertl Delegate is what CPU sees (executable code of one architecture), Expression is what compiler sees (merely another format of source code, but still source code).
– codewarrior
May 5 '17 at 9:22
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Service vs IntentService in the Android platform
...ou specify otherwise). This means that, if your service is going to do any CPU intensive work or blocking operations (such as MP3 playback or networking), you should create a new thread within the service to do that work.
– José Juan Sánchez
Nov 15 '14 at 15:...
What is the best way to compare floats for almost-equality in Python?
...red 0.03 into the system, that's not really the number that made it to the CPU.
– Andrew White
Sep 21 '15 at 1:31
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Purpose of ESI & EDI registers?
...erations that work on a bunch of bytes at a time, and they kind of put the CPU in automatic. Because you're not explicitly coding loops, they do their thing more efficiently (usually) than a hand-coded loop.
Just in case you're wondering: Depending on how you set the operation up, repeated storing ...
How to overload the operator++ in two different ways for postfix a++ and prefix ++a?
...erformance difference. If the object you are returning doesn't fit into a CPU register, then you are doing an expensive copy operation. This is fine if you need to use the pre-incremented value, but if you don't, postfix is much better. An example would be an iterator where you typically use: for...
In what situations would AJAX long/short polling be preferred over HTML5 WebSockets?
...nection - is very inefficient in terms of RAM (1mb+ per thread) as well as CPU, as those threads will just idle or worse - infinite loop of checking for data.
– moka
May 13 '14 at 14:49
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What is the JavaScript convention for no operation?
...rs seem to do nothing to execute the noop defined this way (and hence save CPU cycles), there might be some performance issues associated with this (as is also mentioned by others in comments or in other answers).
However, that being said, you can easily define your own noop function and, infact, m...
When to use reinterpret_cast?
...ic_cast stands for.
On the other hand, when you call reinterpret_cast the CPU does not invoke any calculations. It just treats a set of bits in the memory like if it had another type. So when you convert int* to float* with this keyword, the new value (after pointer dereferecing) has nothing to do ...
How does Java Garbage Collection work with Circular References?
...e "root" set of places that are always considered "reachable", such as the CPU registers, stack, and global variables. It works by finding any pointers in those areas, and recursively finding everything they point at. Once it's found all that, everything else is garbage.
There are, of course, quite...