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How can I truncate a datetime in SQL Server?
...matter how your datetime is stored and no matter what your locale is.
The fast way:
cast(floor(cast(getdate() as float)) as datetime)
This works because datetime columns are stored as 8-byte binary values. Cast them to float, floor them to remove the fraction, and the time portion of the values ...
How to concatenate a std::string and an int?
...;(age);
// 2. with C++11
result = name + std::to_string(age);
// 3. with FastFormat.Format
fastformat::fmt(result, "{0}{1}", name, age);
// 4. with FastFormat.Write
fastformat::write(result, name, age);
// 5. with the {fmt} library
result = fmt::format("{}{}", name, age);
// 6. with IOStreams
s...
What are the most widely used C++ vector/matrix math/linear algebra libraries, and their cost and be
...e nice - it does everything via templates, so it's very flexible, and very fast.
Edit:
After the comments discussion, and edits, I thought I'd throw out some more information about the benefits and downsides to specific implementations, and why you might choose one over the other, given your sit...
Difference between Java Enumeration and Iterator
...
@coobird Are you sure "Enumerations are typically faster" ? since Enumeration has "synchronizing block of code inside the nextElement()" And We don't have Synchronization at Iterators which causes ConcurrentModificationException rit?? Do we call Iterators are typically faste...
TCP 的那些事儿（上） - 更多技术 - 清泛网 - 专注C/C++及内核技术
...计算出timeout的）
快速重传机制
于是，TCP引入了一种叫Fast Retransmit 的算法，不以时间驱动，而以数据驱动重传。也就是说，如果，包没有连续到达，就ack最后那个可能被丢了的包，如果发送方连续收到3次相同的ack，就重传。Fa...
Does python have a sorted list?
...
sortedcontainers is pure-Python and fast-as-C (like rbtree) with a performance comparison.
– GrantJ
Mar 27 '14 at 17:32
...
Git push rejected after feature branch rebase
...
The problem is that git push assumes that remote branch can be fast-forwarded to your local branch, that is that all the difference between local and remote branches is in local having some new commits at the end like that:
Z--X--R <- origin/some-branch (can be fast-forwarded...
How expensive is the lock statement?
... memory into a register takes about 40ns. So 50ns is insanely, blindingly fast - you shouldn't worry about the cost of using lock any more than you'd worry about the cost of using a variable.
– BlueRaja - Danny Pflughoeft
Sep 27 '15 at 15:15
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Is async HttpClient from .Net 4.5 a bad choice for intensive load applications?
...ts, asynchronous HTTP calls are not the best option when dealing with very fast requests. The reason behind that is that when running a task that contains an asynchronous I/O call, the thread on which the task is started is quit as soon the as the asynchronous call is made and the rest of the task i...
Try-catch speeding up my code?
... you catch a specific exception (ArgumentException in my tests) it's still fast
If you print the exception in the catch block it's still fast
If you rethrow the exception in the catch block it's slow again
If you use a finally block instead of a catch block it's slow again
If you use a finally block...