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Why malloc+memset is slower than calloc?
It's known that calloc is different than malloc in that it initializes the memory allocated. With calloc , the memory is set to zero. With malloc , the memory is not cleared.
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Storing SHA1 hash values in MySQL
...r performance reasons.
In my case the sha1 column is an email confirmation token, so on the landing page the query enters only with the token.
In this case CHAR(40) with INDEX, in my opinion, is the best choice :)
If you want to adopt this method, remember to leave $raw_output = false.
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Generating Random Passwords
...will hold password characters.
char[] password = null;
// Allocate appropriate memory for the pas
PostgreSQL, checking date relative to “today”
...days, cast now()::date as Alex Howansky suggested.
– tokenizer_fsj
Jul 4 '19 at 21:40
1
@tokenize...
How do I load a PHP file into a variable?
I need to load a PHP file into a variable. Like include();
8 Answers
8
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What is the meaning of the term arena in relation to memory?
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An arena is just a large, contiguous piece of memory that you allocate once and then use to manage memory manually by handing out parts of that memory. For example:
char * arena = malloc(HUGE_NUMBER);
unsigned int current = 0;
void * my_malloc(size_t n) { current += n; return arena +...
Task vs Thread differences [duplicate]
...u should support
cancel event in your "business code" periodically testing token.IsCancellationRequested flag (also avoid long or timeoutless connections e.g. to db, otherwise you will never get a chance to test this flag). By the similar reason Thread.Sleep(delay) call should be replaced with Task...
When vectors are allocated, do they use memory on the heap or the stack?
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vector<Type> vect;
will allocate the vector, i.e. the header info, on the stack, but the elements on the free store ("heap").
vector<Type> *vect = new vector<Type>;
allocates everything on the free store.
vector<Type*> vect;
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Instantiating a generic class in Java [duplicate]
...<Bar>) then reflectively making a Bar instance with Class<Bar> token = Bar.class; and Bar newBar = token.newInstance(); appears so much less verbose to me.
– scottb
Aug 15 '13 at 20:25
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How to remove elements from a generic list while iterating over it?
...Int % 2 == 0) { test.Remove(myInt); } } You still have to allocate a copy for Reverse and it introduces Huh? moment - why is there Reverse.
– jahav
May 25 '15 at 13:38
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