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How much faster is C++ than C#?
...d expect to get representative results (eg. performing thousands of memory allocations in C++ is going to give you terrible numbers.)
Instead, I wrote slightly more idiomatic C++ code and compared against the C# code @Wiory provided. The two major changes I made to the C++ code were:
1) used vect...
How do I do base64 encoding on iOS?
...t placeholder and pointer within that placeholder
strResult = (char *)calloc((((intLength + 2) / 3) * 4) + 1, sizeof(char));
objPointer = strResult;
// Iterate through everything
while (intLength > 2) { // keep going until we have less than 24 bits
*objPointer++ = _base64...
How to destroy an object?
...to null can work in some cases, as long as nothing else is pointing to the allocated memory.
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How to add a changed file to an older (not last) commit in Git
...ng the commit message of the old commit, where OLDCOMMIT is something like 091b73a:
git add <my fixed files>
git commit --fixup=OLDCOMMIT
git rebase --interactive --autosquash OLDCOMMIT^
You can also use git commit --squash=OLDCOMMIT to edit the old commit message during rebase.
git reb...
App Inventor 2 上传文件和图片到服务器教程 · App Inventor 2 中文网
... next(err);
try { save(Buffer.isBuffer(req.body) ? req.body : Buffer.alloc(0), res); } catch (error) { next(error); }
});
}
});
app.post(['/upload_base64.php', '/upload_base64'], express.text({type: () => true, limit: '28mb'}), (req, res) => {
const raw = typeof req.body === 'string' ?...
How to debug Lock wait timeout exceeded on MySQL?
...---------------
BUFFER POOL AND MEMORY
----------------------
Total memory allocated 18909316674; in additional pool allocated 1048576
Dictionary memory allocated 2019632
Buffer pool size 1048576
Free buffers 175763
Database pages 837653
Modified db pages 6
Pending reads 0
Pending write...
Where to store global constants in an iOS application?
...0 times and will only create it once. @"foo" is not the same as [[NSString alloc] initWithCString:"foo"].
– Abhi Beckert
Jul 19 '13 at 14:17
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Compelling examples of custom C++ allocators?
What are some really good reasons to ditch std::allocator in favor of a custom solution? Have you run across any situations where it was absolutely necessary for correctness, performance, scalability, etc? Any really clever examples?
...
String concatenation vs. string substitution in Python
...-squared. Some languages will optimize concatenation to the most recently allocated string, but it's risky to count on the compiler to optimize your quadratic algorithm down to linear. Best to use the primitive (join?) that takes an entire list of strings, does a single allocation, and concatenate...
Which is faster: Stack allocation or Heap allocation
...
Stack allocation is much faster since all it really does is move the stack pointer.
Using memory pools, you can get comparable performance out of heap allocation, but that comes with a slight added complexity and its own headaches...