大约有 745 项符合查询结果（耗时：0.0104秒） [XML]
Is there a REAL performance difference between INT and VARCHAR primary keys?
...) {
$val .= '("' . generate_random_string() . '", ' . rand (0, 10000) . ', "' . ($keys[rand(0, 9)]) . '"),';
}
$val = rtrim($val, ',');
$pdo->query('INSERT INTO jan_char VALUES ' . $val);
}
echo "\n" . ($k + 1) . ' millon(s) rows inserted.';
}
For int...
How to split text without spaces into list of words?
...xcessive memory usage. For example you could process the text in blocks of 10000 characters plus a margin of 1000 characters on either side to avoid boundary effects. This will keep memory usage to a minimum and will have almost certainly no effect on the quality.
...
How to use unicode characters in Windows command line?
...rendering supports only Unicode characters in BMP (in other words: below U+10000). Only simple text rendering is supported (so European — and some East Asian — languages should work fine — as far as one uses precomposed forms). [There is a minor fine print here for East Asian and...
Which is more efficient: Multiple MySQL tables or one large table?
...
If you have 10000 users and you are doing a join with a database set up with foreign keys correctly then you should only need the intense lookup by doing something like select * from users where name="bob". Once you have bob then you are...
Implement C# Generic Timeout
...read.Sleep(1000);
}
static void Nasty()
{
Thread.Sleep(10000);
}
static void DoWork(Action action, int timeout)
{
ManualResetEvent evt = new ManualResetEvent(false);
AsyncCallback cb = delegate {evt.Set();};
IAsyncResult result = action.BeginIn...
Defining a HTML template to append using JQuery
...ed is about 3:1 for a random <tr/> I had on a page using this code i=10000; time=performance.now(); while (--i) {$a.clone().append(0 ? $b.html() : $b.children().clone())} performance.now()-time. The ratio is actually a bit more exaggerated because I'm using $a.clone(), but trying to empty it e...
Is there a better way to express nested namespaces in C++ within the header
...e of) symbols in a namespace. say, 1 doesn't make sense, 100 sounds right, 10000 is clearly to much.
TL;DR: It's a tradeoff, and we don't have hard numbers. Play safe, don't overdo in any direction. The "Don't do that" comes merely from the "You have problems with that, I'd have problems with th...
Is the != check thread safe?
...te static Integer count=1;
@Test(threadPoolSize = 1000, invocationCount=10000)
public void test(){
count = new Integer(new Random().nextInt());
Assert.assertFalse(count != count);
}
}
I have 2 fails on 10 000 invocations. So NO, it is NOT thread safe
...
How to iterate through two lists in parallel?
...ar[f])
store.append( (f, bar[f]) )
list_sizes = [ 10, 100, 1000, 10000, 100000, 1000000 ]
tz = []
te = []
tc = []
ti = []
tii= []
tcz = []
tce = []
tci = []
tcii= []
for a in list_sizes:
foo = [ i for i in range(a) ]
bar = [ i for i in range(a) ]
indices = [ i for i in range(...
Should composer.lock be committed to version control?
...ncies and you wouldn't need to commit them. Why would you add to your repo 10000 files of dependencies, when you are not supposed to be updating them. If you require to change one of this, you should fork it and make your changes there. And if you are worried about having to fetch the actual depende...