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Speed comparison with Project Euler: C vs Python vs Erlang vs Haskell
...d. From what I've understood, this transformation can result in additional allocations of closure objects. This means worse performance in some cases, but as Johan Tibell suggests in his blog post this can be avoided if the resulting wrapper can be inlined.
– hammar
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Replacing all non-alphanumeric characters with empty strings
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He's probably used to programming in PHP.
– William
Nov 26 '09 at 20:31
10
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C# 能否获取一个对象所占内存的大小？ - 更多技术 - 清泛网 - 专注C/C++及内核技术
...e or SOS (son-of-strike) shows you how objects are laid out. Or you could allocate two objects and then use unverifiable operations to subtract the addresses. 99.9% of the time, the two objects will be adjacent. You can also use a managed profiler to get a sense of how much memory is consumed by i...
Initialise a list to a specific length in Python [duplicate]
...on at PyCon 2012, Raymond Hettinger is suggesting to use [None] * n to pre-allocate the length you want.
Slides available as PPT or via Google
The whole slide deck is quite interesting.
The presentation is available on YouTube, but it doesn't add much to the slides.
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Is it possible to iterate through JSONArray? [duplicate]
...ch is not mutable from outside the instance, setting a variable would just allocate more memory 8-).
– Mathijs Segers
Jan 23 '15 at 13:14
1
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Is there a way to programmatically tell if particular block of memory was not freed by FastMM?
...example I would like to have in a database table a names of routines which allocated given blocks.
1 Answer
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Interpret XMP-Metadata in ALAssetRepresentation
... a buffer to hold the data for the asset's image
uint8_t *buffer = (Byte*)malloc(representation.size); // Copy the data from the asset into the buffer
NSUInteger length = [representation getBytes:buffer fromOffset: 0.0 length:representation.size error:nil];
if (length==0)
return nil;
// Conve...
Why is reading lines from stdin much slower in C++ than Python?
...ause that quite simply doesn't do as much work as Python does. Python must allocate memory for the string, possibly multiple times as the existing allocation is deemed inadequate - exactly like the C++ approach with std::string. This task is almost certainly I/O bound and there is way too much FUD g...
how to show alternate image if source image is not found? (onerror working in IE but not in mozilla)
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If you're open to a PHP solution:
<td><img src='<?PHP
$path1 = "path/to/your/image.jpg";
$path2 = "alternate/path/to/another/image.jpg";
echo file_exists($path1) ? $path1 : $path2;
?>' alt='' />
</td>
////EDI...
项目管理实践【四】Bug跟踪管理【Bug Trace and Management】 - 项目管理 -...
...理工具 Product Stuido（以前叫Raid）的自由软件。BugFree是用PHP+MySQL写，在Linux和Windows平台上都可以运行，我们推荐的使用环境是LAMP（Linux+Apache+MySQL+PHP）。
下面是是园子里的一些资源，由于同类的资源较多，只选取了较新的几篇。...