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Find running median from a stream of integers
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Is there is a way to make this faster by calculating the difference instead of the median? Is the removed and added sample and the previous median enough information for that?
– inf3rno
Apr 14 at 13:32
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How do I determine whether my calculation of pi is accurate?
...f performing two computations, we performed only one computation using the fastest known formula (Chudnovsky Formula):
This algorithm is much harder to implement, but it is a lot faster than the AGM algorithms.
Then we verify the binary digits using the BBP formulas for digit extraction.
This...
When to use a linked list over an array/array list?
...ortized insertion and worst-case logarithmic delete-min, and are among the fastest practical priority queue structures.
– Fred Foo
Jun 4 '13 at 13:29
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Is MATLAB OOP slow or am I doing something wrong?
...on a classdef object. Same for Java objects (not shown). If you want to go fast, call nop(obj).
Method call overhead is higher (about 2x) in 64-bit MATLAB on Windows. (Not shown.)
MATLAB method dispatch is slower than some other languages.
Saying why this is so would just be speculation on my part...
Difference between binary semaphore and mutex
...koverflow.com/a/5492499/385064 'Pthreads has 3 different kinds of mutexes: Fast mutex, recursive mutex, and error checking mutex. You used a fast mutex which, for performance reasons, will not check for this error. If you use the error checking mutex on Linux you will find you get the results you ex...
Pandas percentage of total with groupby
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This is super fast. I would recommend this as the preferred pandas approach. Really takes advantage of numpy's vectorization and pandas indexing.
– Charles
Mar 23 '18 at 12:14
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How to fix SSL certificate error when running Npm on Windows?
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Certificate chain
0 s:/C=US/ST=California/L=San Francisco/O=Fastly, Inc./CN=a.sni.fastly.net
i:/C=US/O=DigiCert Inc/OU=www.digicert.com/CN=DigiCert High Assurance CA-3
1 s:/C=US/O=DigiCert Inc/OU=www.digicert.com/CN=DigiCert High Assurance CA-3
i:/C=US/O=DigiCert In...
How do you remove duplicates from a list whilst preserving order?
... have some alternatives: http://www.peterbe.com/plog/uniqifiers-benchmark
Fastest one:
def f7(seq):
seen = set()
seen_add = seen.add
return [x for x in seq if not (x in seen or seen_add(x))]
Why assign seen.add to seen_add instead of just calling seen.add? Python is a dynamic languag...
Should import statements always be at the top of a module?
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Module importing is quite fast, but not instant. This means that:
Putting the imports at the top of the module is fine, because it's a trivial cost that's only paid once.
Putting the imports within a function will cause calls to that function to tak...
PHP cURL vs file_get_contents
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This is old topic but on my last test on one my API, cURL is faster and more stable. Sometimes file_get_contents on larger request need over 5 seconds when cURL need only from 1.4 to 1.9 seconds what is double faster.
I need to add one note on this that I just send GET and recive JSON ...