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Clear file cache to repeat performance testing
...hnique (other than rebooting) that seems to work:
Run a few copies of MemAlloc
With each one, allocate large chunks of memory a few times
Use Process Explorer to observe the System Cache size reducing to very low levels
Quit the MemAlloc programs
It isn't selective though. Ideally I'd like to be...
Fastest method to escape HTML tags as HTML entities?
... makes my system run out of RAM (with ~6GB free) and firefox seems to stop allocating just before it's out of memory so instead of killing the offending process, linux will sit there and let you do a hard power off.
– Luc
Jul 11 at 9:09
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What is the default initialization of an array in Java?
...ava Virtual Machine is not required to zero out the underlying memory when allocating local variables (this allows efficient stack operations if needed) so to avoid random values the Java Language Specification requires local variables to be initialized.
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Invalid argument supplied for foreach()
...ue)
{
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}
}
The reason for my preference is it doesn't allocate an empty array when you've got nothing to begin with anyway.
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How do I generate a stream from a string?
... This is very compact syntax but it's going to cause a lot of allocations of byte[] so beware in high performance code.
– michael.aird
Mar 19 '17 at 19:08
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What's “P=NP?”, and why is it such a famous question? [closed]
...On the other hand, there's whole classes of planning problems and resource allocation problems that we could solve effectively.
You may have heard the description NP-complete. An NP-complete problem is one that is NP (of course), and has this interesting property: if it is in P, every NP problem ...
How efficient is locking an unlocked mutex? What is the cost of a mutex?
...you wish. You are only limited by the amount of memory you application can allocate.
Summary. User-space locks (and the mutexes in particular) are cheap and not subjected to any system limit. But too many of them spells nightmare for debugging. Simple table:
Less locks means more contentions (slo...
Current location permission dialog disappears too quickly
...e was like this.
CLLocationManager *locationManager = [[CLLocationManager alloc] init];
[locationManager startUpdatingLocation];
CLLocation *location = locationManager.location;
//my stuff with the location
[locationManager release];
Now the location alert disppeared quickly.
When I uncomme...
From Arraylist to Array
...te array that is big enough to put all elements. In this case it is not re-allocated.
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Print a list in reverse order with range()?
... in general but it accepts range. Why would reversed(range(10000)) need to allocate memory for the whole list? range can return an object that implements the __reversed__ method that allows efficient reverse iteration?
– avmohan
Aug 5 '17 at 10:45
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