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How to Deal with Temporary NSManagedObject instances?
...ul as standing up a NSManagedObjectContext is expensive in both memory and CPU. I realize this was originally in some of the Apple examples, but they have updated and corrected those examples.
– Marcus S. Zarra
Jul 16 '10 at 15:39
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Is there a performance impact when calling ToList()?
....CopyTo(). This operation is quite efficient and probably will map to some CPU instruction for copying blocks of memory. However, in terms of performance memory is required for the new array and CPU cycles are required for copying all the elements.
Otherwise the size of the source collection is unkn...
How to deal with a slow SecureRandom generator?
...ized environment because it doesn't require any special hardware, only the CPU itself and a clock.
On Ubuntu/Debian:
apt-get install haveged
update-rc.d haveged defaults
service haveged start
On RHEL/CentOS:
yum install haveged
systemctl enable haveged
systemctl start haveged
Option 2. Reduce...
Simulating tremor (from e.g. Parkinson's Disease) with the mouse on a webpage?
...ou might want to replace the colon by something like "sleep 0.01" to limit cpu usage and speed, because on my rig it makes unrealistic fast jumps with your code.
– nonchip
Aug 13 '14 at 17:11
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Why Large Object Heap and why do we care?
...sn't just make memory usage more efficient (no unused holes), it makes the CPU cache much more efficient. The cache is a really big deal on modern processors, they are an easy order of magnitude faster than the memory bus.
Compacting is done simply by copying bytes. That however takes time. The ...
Why is Magento so slow? [closed]
...ame trees for information. This takes both memory (storing the trees) and CPU (parsing the trees). Some of these (especially the layout tree) are huge. Also, unless caching is on, these tree are built up from files on disk and on each request.
Magento uses its configuration system to allow you to...
How do I measure time elapsed in Java? [duplicate]
...re; basically some implementations of nanoTime on some versions of OS/Java/CPU will use hardware CPU time stamp counter (TSC) . However this TSC may not be the same between cores/processors. If your thread is rescheduled to a different core partway through, you will end up with a start timestamp fro...
Scheduling recurring task in Android
...accept best answer if I am wrong .
Alarm Manager
The Alarm Manager holds a CPU wake lock as long as the alarm receiver's onReceive() method is executing. This guarantees that the phone will not sleep until you have finished handling the broadcast. Once onReceive() returns, the Alarm Manager releases...
How to articulate the difference between asynchronous and parallel programming?
...nimation can also be considered as an individual task. If we have multiple CPUs/Cores or multiple machines available, we can render multiple frames in parallel to speed up the overall workload.
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Difference between java.util.Random and java.security.SecureRandom
... - In case of random just 2^48 attempts are required, with todays advanced cpu's it is possible to break it in practical time. But for securerandom 2^128 attempts will be required, which will take years and years to break even with today's advanced machines.
See this link for more details.
EDIT
A...