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How long is the SHA256 hash?
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varchar also doesn’t allocate space unless its used, unlike char it allocates the number of amount of total characters allowed regardless if there is data filling it.
– Xenland
Feb 11 '13 at 16:44
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What is the difference between buffer and cache memory in Linux?
...el will run heuristics to reclaim the memory by storing the cache data and allocating that memory to new process.
When any kind of file/data is requested then the kernel will look for a copy of the part of the file the user is acting on, and, if no such copy exists, it will allocate one new page of...
How do I get the directory that a program is running from?
... even if some documentations say that cCurrentpath can be null and will be allocated by getcwd getcwd does not seem to allocate something on Mac OS and quietly crashes your program
– Janusz
Jun 30 '09 at 2:52
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How can I divide two integers to get a double?
...Divide(100, 863)
//0.1158748551564310544611819235
Double are represented allocating 64 bits while decimal uses 128
(double)100/863
//0.11587485515643106
In depth explanation of "precision"
For more details about the floating point representation in binary and its precision take a look at this ...
When should you not use virtual destructors?
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Virtual functions mean every allocated object increases in memory cost by a virtual function table pointer.
So if your program involves allocating a very large number of some object, it would be worth avoiding all virtual functions in order to save the ...
Compare if two variables reference the same object in python
... @Bill: That is an artefact of how python handles ints. Python allocates integer objects to which x and z point. Since small integers are failry common (-1 as an error value, 0 any time you actually index something, small numbers are usually reasonable default values) Python optimizes by...
How to cast an object in Objective-C
...g works as it does in C:
myEditController = [[SelectionListViewController alloc] init];
((SelectionListViewController *)myEditController).list = listOfItems;
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What Are Some Good .NET Profilers?
...o file)
Scitech .NET Memory Profiler
Shows stack trace when object was allocated. This is really useful for objects that are allocated in lots of different places. With ANTS it is difficult to determine exactly where the leaked object was created.
Shows count of disposable objects that were not ...
Why is there huge performance hit in 2048x2048 versus 2047x2047 array multiplication?
... your cache.
Now to test this theory there are couple things you can do:
Allocate your array matice2 array like this matice2 [razmor, 4096], and run with razmor = 1024, 1025 or any size, and you should see very bad performance compared to what you had before. This is because you forcefully align a...
Create UIActionSheet 'otherButtons' by passing in array, not varlist
... Button",@"4th Button"];
UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:@"Title Here"
delegate:self
cancelButtonTitle:nil
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