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When someone writes a new programming language, what do they write it IN?
...chine language, converting a grammar specification to C code for a parser, etc. Its designer specifies the structure of the source format (parsing), what those structures mean, how to simplify the data (optimizing), and the kind of output to generate. Interpreters read the source and execute it dire...
Hashing a file in Python
...chunks the hash function finds ideal which makes it faster or at lest less CPU intensive to compute the hash function. So instead of disabling buffering and trying to emulate it yourself, you use Python buffering and control what you should be controlling: what the consumer of your data finds ideal,...
The difference between fork(), vfork(), exec() and clone()
...ch data structures (memory space, processor state, stack, PID, open files, etc) are shared or not.
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What does SynchronizationContext do?
...SynchronizationContext, ThreadPool.QueueUserWorkItem, control.BeginInvoke, etc. over to the new async / await keywords and the Task Parallel Library (TPL), i.e. the API surrounding the Task and Task<TResult> classes. These will, to a very high degree, take care of capturing the UI thread's syn...
iOS 7 style Blur view
... of course, FXBlurView is good option,but when there is matter of CPU usage. than i prefer other blurView. i use this in my UICollectionVIew and UITableView but it increase my CPU usage. in next run i comment those allocations and it becomes normal. i hope, this will help someone.
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Multiprocessing: How to use Pool.map on a function defined in a class?
...eak
q_out.put((i, f(x)))
def parmap(f, X, nprocs=multiprocessing.cpu_count()):
q_in = multiprocessing.Queue(1)
q_out = multiprocessing.Queue()
proc = [multiprocessing.Process(target=fun, args=(f, q_in, q_out))
for _ in range(nprocs)]
for p in proc:
p.da...
What is the difference between using IDisposable vs a destructor in C#?
...ngs to GC) - but is used for example to close files, database connections, etc.
There are lots of previous topics on this:
deterministic finalization
disposing objects
using block
resources
Finally, note that it is not uncommon for an IDisposable object to also have a finalizer; in this case, D...
Difference between static memory allocation and dynamic memory allocation
...ister' variables. As expected, register variables should be allocated on a CPU's register, but the decision is actually left to the compiler. You may not turn a register variable into a reference by using address-of.
register int meaning = 42;
printf("%p\n",&meaning); /* this is wrong and will...
Why use armeabi-v7a code over armeabi code?
...ices, but will be a lot slower, and won't take advantage of newer devices' CPU capabilities. Do take some benchmarks for your particular application, but removing the armeabi-v7a binaries is generally not a good idea. If you need to reduce size, you might want to have two separate apks for older (a...
How would Git handle a SHA-1 collision on a blob?
...ations. This took the equivalent processing power as 6,500 years of single-CPU computations and 110 years of single-GPU computations.
b/ would forge one file (with the same SHA1), but with the additional constraint its content and size would produce the identical SHA1 (a collision on the content al...