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What's the best free C++ profiler for Windows? [closed]
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I tried working with it now, and didn't like it at all. I couldn't even understand how to get function's total time % (including the callees) which TrueTime could do fine 10 years ago.
– Pavel Radzivilovsky
Mar 13 '11 at 15:05
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Clean way to launch the web browser from shell script?
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If the user has Python installed... But thanks for mentioning the webbrowser module !
– nicoulaj
Jun 26 '10 at 17:41
2
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__lt__ instead of __cmp__
...ttributes of the new class it's decorating (the result might be microscopically faster at runtime, at equally minute cost in terms of memory).
Of course, if your class has some particularly fast way to implement (e.g.) __eq__ and __ne__, it should define them directly so the mixin's versions are no...
RuntimeError on windows trying python multiprocessing
...void creating subprocesses recursively.
Modified testMain.py:
import parallelTestModule
if __name__ == '__main__':
extractor = parallelTestModule.ParallelExtractor()
extractor.runInParallel(numProcesses=2, numThreads=4)
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hasNext in Python iterators?
...thod to put the first element back after I have checked that it exists by calling next().
– Giorgio
Dec 24 '12 at 20:26
16
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Multiple variables in a 'with' statement?
...textlib.nested, this guarantees that a and b will have their __exit__()'s called even if C() or it's __enter__() method raises an exception.
You can also use earlier variables in later definitions (h/t Ahmad below):
with A() as a, B(a) as b, C(a, b) as c:
doSomething(a, c)
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Best practices for circular shift (rotate) operations in C++
...,7 which is slower and takes more bytes than rol edi,7 on some CPUs (especially AMD, but also some Intel), when BMI2 isn't available for rorx eax,edi,25 to save a MOV.
MSVC: x86-64 CL19: Only recognized for constant-count rotates. (The wikipedia idiom is recognized, but the branch and AND aren't op...
Delete all documents from index/type without deleting type
I know one can delete all documents from a certain type via deleteByQuery.
15 Answers
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How many concurrent AJAX (XmlHttpRequest) requests are allowed in popular browsers?
... No, the limits are imposed on the domain. So you could technically get FF up to 12 connections if you had a subdomain in addition to your site.
– Bob
Feb 18 '09 at 13:39
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What is the most ridiculous pessimization you've seen? [closed]
We all know that premature optimization is the root of all evil because it leads to unreadable/unmaintainable code. Even worse is pessimization, when someone implements an "optimization" because they think it will be faster, but it ends up being slower, as well as being buggy, unmaintainable, etc...