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How can I pad an integer with zeros on the left?
...running the two in Visual VM shows the String.format() method accumulating CPU time at about 3-4 times the rate of DecimalFormat.format().
– Steve Ferguson
May 1 '13 at 17:56
11
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Does PHP have threading?
... i'll shortly describe both:
A thread is a sequence of commands that the CPU will process. The only data it consists of is a program counter. Each CPU core will only process one thread at a time but can switch between the execution of different ones via scheduling.
A process is a set of shared res...
How to increase the execution timeout in php?
... on Unix environments the max-execution time is compared to the cumulative CPU-time used by the php-thread, on windows systems the absolute time is used. Uploading is mostly "idle-time" (IO-Wait). But as you see uploads can stop when it takes too long even though.
– Christoph S...
What does the property “Nonatomic” mean?
...ime, you need to hold a mutex or do some other low-level tricks which cost CPU time. If you're using a lock, you can also end up blocking on other threads, which takes time, too.
– Jesse Rusak
Apr 26 '13 at 12:10
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pythonic way to do something N times without an index variable?
...tion a million times, let's allocate a list of a million items too. If the CPU is working, shouldn't also the memory get stressed a little? The answer cannot be characterized as definitely “not useful” (it's showing a different, functioning approach) so I can't downvote, but I disagree and I'm t...
Convert Enum to String
...ject argument. This means that the value will be boxed and this will waste CPU resources on the allocation and on the garbage collection. If this is done a lot of time, Enum.GetName will have a much lower throughput than caching the values in a dictionary and looking for the name there.
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Remove spaces from std::string in C++
...lower! (up to 5 times in unordered_map inserts) Maybe it is because of the CPU cache of the shared environment or something like it.
– Etherealone
Aug 14 '12 at 20:23
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Alternatives to gprof [closed]
...des in a graph. Also I think wall-clock time is generally more useful than CPU instruction times, and code lines (call instructions) are more useful than procedures. If stack samples at random wall clock times are taken, then the fractional cost of a line (or procedure, or any other description you ...
Using git repository as a database backend
...n terms of disc usage, and such disc usage automatically means pretty high CPU usage.
"Only active users" approach: maintain working copy only for active users. This way, you generally store not a full-repo-clone-per-user, but:
As user logs in, you clone the repository. It takes several seconds an...
linux svn搭建配置及svn命令详解 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...定也会出现混乱的情况，版本管理系统就是为了解决这些问题。
SVN中的一些概念 :
a. repository（源代码库）
源代码统一存放的地方。
b. Checkout （提取）
当你手上没有源代码的时候，你需要从repository checkout一份。
c...