大约有 3,285 项符合查询结果（耗时：0.0274秒） [XML]
Is there a way to loop through a table variable in TSQL without using a cursor?
...you need to iterate through each row — set based operations will perform faster in every case I can think of and will normally use simpler code.
Depending on your data it may be possible to loop using just SELECT statements as shown below:
Declare @Id int
While (Select Count(*) From ATable Wher...
Ruby, remove last N characters from a string?
... Ruby 2.5 you can use delete_suffix or delete_suffix! to achieve this in a fast and readable manner.
The docs on the methods are here.
If you know what the suffix is, this is idiomatic (and I'd argue, even more readable than other answers here):
'abc123'.delete_suffix('123') # => "abc"
'ab...
Are tuples more efficient than lists in Python?
...ng an element generates identical code, but that assigning a tuple is much faster than assigning a list.
>>> def a():
... x=[1,2,3,4,5]
... y=x[2]
...
>>> def b():
... x=(1,2,3,4,5)
... y=x[2]
...
>>> import dis
>>> dis.dis(a)
2 0 LOAD...
When to use MyISAM and InnoDB? [duplicate]
...base is queried far more than its updated and as a result it performs very fast read operations. If your read to write(insert|update) ratio is less than 15% its better to use MyISAM.
...
Implementing Fast and Efficient Core Data Import on iOS 5
...n', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f10542097%2fimplementing-fast-and-efficient-core-data-import-on-ios-5%23new-answer', 'question_page');
}
);
Post as a guest
...
How can I eliminate slow resolving/loading of localhost/virtualhost (a 2-3 second lag) on Mac OS X L
...tual host is very slow (around 3 seconds) the first time but after that is fast as long as I continue loading it regularly.
...
Why is creating a new process more expensive on Windows than Linux?
...hell. Unix was designed with this very kind of usage in mind, which is why fast process creation remains the norm there.
– Dan Moulding
Aug 11 '16 at 15:51
5
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Why does Unicorn need to be deployed together with Nginx?
...
@loganathan, Both Apache and Nginx are much faster at serving static content than ruby or any of the application servers. They also know how to handle caching and are good at allowing concurrent file downloads while still taking in traffic and passing it to the applica...
System.Threading.Timer in C# it seems to be not working. It runs very fast every 3 second
...ing to control the periodicy yourself.
Your original code is running as fast as possible, since you keep specifying 0 for the dueTime parameter. From Timer.Change:
If dueTime is zero (0), the callback method is invoked immediately.
...
How do I get Windows to go as fast as Linux for compiling C++?
...times per transfer are bad signs.
The first 30% of disk partitions is much faster than the rest of the disk in terms of raw transfer time. Narrower partitions also help minimize seek times.
Are you using RAID? If so, you may need to optimize your choice of RAID type (RAID-5 is bad for write-heavy op...