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How do I convert CamelCase into human-readable names in Java?
...s fine, very focus on performance. b) When the conversion is done a lot of times this method is much faster than the regex-based one: this is my benchmark for executing the aforementioned tests 100,000 times: ``` regex-based method took 4820 milliseconds ////////// commons-lang-based method took 23...
Type converting slices of interfaces
...x/costly operations. Converting a string to an interface{} is done in O(1) time. Converting a []string to an interface{} is also done in O(1) time since a slice is still one value. However, converting a []string to an []interface{} is O(n) time because each element of the slice must be converted to ...
Logging uncaught exceptions in Python
...
As Ned pointed out, sys.excepthook is invoked every time an exception is raised and uncaught. The practical implication of this is that in your code you can override the default behavior of sys.excepthook to do whatever you want (including using logging.exception).
As a straw...
rreplace - How to replace the last occurrence of an expression in a string?
...ypical string in my program (> 500 characters), your solution was three times faster than Alex's solution and four times faster than Mark's solution. Thanks to all for your answers!
– Barthelemy
Mar 31 '10 at 20:44
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What uses are there for “placement new”?
...le instances of an object, and it is faster not to re-allocate memory each time you need a new instance. Instead, it might be more efficient to perform a single allocation for a chunk of memory that can hold multiple objects, even though you don't want to use all of it at once.
DevX gives a good ex...
boost多索引容器multi_index_container实战 - C/C++ - 清泛网 - 专注C/C++及内核技术
...---插入%d次-----------------\n", persons.size());
{
TIME_COUNTER_DEFAULT("Container插入");
for (Persons::iterator it = persons.begin(); it != persons.end(); ++it) {
container.insert(*it);
}
}
{
TIME_COUNTER_...
Delete empty lines using sed
...er although - for a quick and dirty test - I am invoking awk twice: $ time (topic companies <data.tpx | awk 'NF' - | awk -f dialog_menu.awk -) real 0m0.006s user 0m0.000s sys 0m0.008s $ time (topic companies <data.tpx | gsed '/^\s*$/d' | awk -f dialog_menu.awk ...
Python - Create a list with initial capacity
...esult[i]= message
return result
Results. (evaluate each function 144 times and average the duration)
simple append 0.0102
pre-allocate 0.0098
Conclusion. It barely matters.
Premature optimization is the root of all evil.
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load scripts asynchronously
...nd .css files. I need to create a loader for my site because it takes some time to load. it will be nice if I can display the loader before importing all the:
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Can you call Directory.GetFiles() with multiple filters?
...Glad to see it's only about twice as slow - I'll stick with it for the meantime I think.
– Dan W
Feb 17 '13 at 19:47
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