大约有 15,000 项符合查询结果（耗时：0.0227秒） [XML]
What is the difference between mutex and critical section?
...;
LARGE_INTEGER freq;
QueryPerformanceFrequency(&freq);
LARGE_INTEGER start, end;
// Force code into memory, so we don't see any effects of paging.
EnterCriticalSection(&critSec);
LeaveCriticalSection(&critSec);
QueryPerformanceCounter(&start);
for (int i = 0; i < 1000000; i++)
...
How to benchmark efficiency of PHP script
...in the callgraph collected.
Once the extension is compiled and loaded you start profiling in the code with:
xhprof_enable(XHPROF_FLAGS_CPU + XHPROF_FLAGS_MEMORY);
To stop:
$xhprof_data = xhprof_disable();
Then save the data to a file, or database - whatever floats your boath and doesn't inter...
Mercurial move changes to a new branch
...
summary: initial
This means, revision 0 is the base on which you started to work on your feature. Now you want to have revisions 1-2 on a named branch, let's say my-feature. Update to revision 0 and create that branch:
$ hg up 0
$ hg branch my-feature
$ hg ci -m "start new branch my-featu...
How to set up Spark on Windows?
...gest you install Spark on a linux virtual machine. The simplest way to get started probably is to download the ready-made images made by Cloudera or Hortonworks, and either use the bundled version of Spark, or install your own from source or the compiled binaries you can get from the spark website.
...
How to stop C++ console application from exiting immediately?
...
If you are using Visual Studio and you are starting the console application out of the IDE:
pressing CTRL-F5 (start without debugging) will start the application and keep the console window open until you press any key.
...
How to set entire application in portrait mode only?
...on subclass in your project. In its onCreate(), called when your app first starts up, you register an ActivityLifecycleCallbacks object (API level 14+) to receive notifications of activity lifecycle events.
This gives you the opportunity to execute your own code whenever any activity in your app is...
Learning Ruby on Rails
...tly more appealing personally for development. Particularly now that I've started using git, the implementation is cleaner on linux.
Currently I'm dual booting and getting closer to running Ubuntu full time. I'm using gedit with various plugins for the development environment. And as of late 2010...
For homebrew mysql installs, where's my.cnf?
...
There is no my.cnf by default. As such, MySQL starts with all of the default settings. If you want to create your own my.cnf to override any defaults, place it at /etc/my.cnf.
Also, you can run mysql --help and look through it for the conf locations listed.
Default op...
Viewing full output of PS command
...list of output fields, otherwise it will be truncated.
ps -A -o args,pid,lstart gives
/usr/lib/postgresql/9.5/bin 29900 Thu May 11 10:41:59 2017
postgres: checkpointer proc 29902 Thu May 11 10:41:59 2017
postgres: writer process 29903 Thu May 11 10:41:59 2017
postgres: wal writer proces 29904 T...
How do I run Visual Studio as an administrator by default?
...
Try the following steps on Windows 10:
Search for Visual Studio on the Start window and select "Open file location":
Select "Troubleshoot compatibility" :
Select "troubleshoot program":
Raise permissions:
Select "Yes, save these settings for this program"
Select "Close"
Once that is...