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What are the main performance differences between varchar and nvarchar SQL Server data types?
... highlighting how bad nvarchar performance can be...
SQL Server uses high CPU when searching inside nvarchar strings
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What does a just-in-time (JIT) compiler do?
...ime, as it's called) into a form that's usually faster, typically the host CPU's native instruction set. A JIT has access to dynamic runtime information whereas a standard compiler doesn't and can make better optimizations like inlining functions that are used frequently.
This is in contrast to a t...
Gson: Directly convert String to JsonObject (no POJO)
...t jsonObj = element.getAsJsonObject();
– Jimmy Garpehäll
Dec 6 '19 at 9:26
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UITableView row animation duration and completion callback
... answered Jan 27 '17 at 8:39
Frédéric AddaFrédéric Adda
4,96033 gold badges4848 silver badges6767 bronze badges
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Run an untrusted C program in a sandbox in Linux that prevents it from opening files, forking, etc.?
...rotect against memory overuse and any fork bombs, as well as put a stop to CPU hogs. nice(1) can lower the priority of those programs so that the computer can be used for any tasks that are deemed more important with no problem.
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Command to get time in milliseconds
...ime.
$ time date +%s%N
1597103627N
date +%s%N 0.00s user 0.00s system 63% cpu 0.006 total
Python is still improving it's VM start time, and it is not as fast as ahead-of-time compiled code (such as date).
On my machine, it took about 30ms - 60ms (that is 5x-10x of 6ms taken by date)
$ time python ...
What does 'stale file handle' in Linux mean?
Say I have a terminal open, and through that terminal I have cd 'ed to some directory. Through another terminal, I delete that directory and restore it back from an identical backup. When I try to vim a file from the first terminal, in the same directory, why do I get an error about a stale file ...
Add 10 seconds to a Date
...onds" and the most voted answer is wrong.
– Philipp Gächter
Jun 23 '14 at 7:32
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Remove all elements contained in another array
...ound it, just awesome. Thank you very much!
– Tarvo Mäesepp
Sep 1 '19 at 18:58
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Linux C/C++程序常用的调试手段及异常排查总结 - C/C++ - 清泛网 - 专注C/C++及内核技术
...序逻辑错误
概率性错误
进程卡死或挂掉，系统变卡，cpu 调度变慢
程序正常，程序性能瓶颈分析
三年下来，排查的问题不少，该遇到的都遇到了，不该遇到的也遇到了，只能说五味杂陈。
现在的我大概是这样的，一段...