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List changes unexpectedly after assignment. How do I clone or copy it to prevent this?
...end(old_list)
0.039 sec (0.39us/itn) - old_list[:] (list slicing)
So the fastest is list slicing. But be aware that copy.copy(), list[:] and list(list), unlike copy.deepcopy() and the python version don't copy any lists, dictionaries and class instances in the list, so if the originals change, the...
Which would be better for concurrent tasks on node.js? Fibers? Web-workers? or Threads?
...y Grandfather's time!!! Why don't you create some threads and make it much faster?
-- Oh, we have only one CPU core.
-- So what? Create some threads man, make it faster!
-- It does not work like that. If I create threads I will be making it slower. Because I will be adding a lot of overhead to th...
What Makes a Method Thread-safe? What are the rules?
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There is no hard and fast rule.
Here are some rules to make code thread safe in .NET and why these are not good rules:
Function and all functions it calls must be pure (no side effects) and use local variables. Although this will make your co...
Is recursion ever faster than looping?
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I know that in some Scheme implementations, recursion will generally be faster than looping.
In short, the answer depends on the code and the implementation. Use whatever style you prefer. If you're using a functional language, recursion might be faster. If you're using an imperative language...
Is calculating an MD5 hash less CPU intensive than SHA family functions?
...USB will top below 60 MB/s. Even though SHA-256 appears "slow" here, it is fast enough for most purposes.
Note that OpenSSL includes a 32-bit implementation of SHA-512 which is quite faster than my code (but not as fast as the 64-bit SHA-512), because the OpenSSL implementation is in assembly and u...
How do cache lines work?
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An access of the main memory costs about 70ns to 100ns (DDR4 is slightly faster). This time is basically looking up the L1, L2 and L3 cache and than hit the memory (send command to memory controller, which sends it to the memory banks), wait for the response and done.
100ns means about 200 ticks...
What is the best way to measure execution time of a function? [duplicate]
...ulating an average.
Not only makes it more measurable - in case of really fast/short functions, but helps dealing with some one-off effects caused by the overhead.
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Determining if a variable is within range?
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elsif (11..20).cover? i then thing_2
and according to this benchmark in Fast Ruby is faster than include?
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Why does the Visual Studio editor show dots in blank spaces?
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Thanks, this happens sometimes when clicking too fast (in the wrong window). It's already the third time I came here to look it up, thx
– Joost Schepel
Oct 15 '12 at 12:40
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C#: Difference between List and Collection (CA1002, Do not expose generic lists) [duplicate]
...oes not have virtual methods for Add, Remove etc, as it was designed to be fast, not extensible. This means that you cannot swap this concrete implementation out for a useful subclass (even though you can subclass it as it is not sealed).
Therefore, by exposing the List itself, you can never exten...