大约有 15,000 项符合查询结果（耗时：0.0267秒） [XML]
Does ruby have real multithreading?
...un one thread at a
time.
However, any number of C Threads (POSIX Threads etc.) can run
in parallel to the Ruby Thread, so external C Libraries, or MRI
C Extensions that create threads of their own can still run in
parallel.
The second implementation is YARV (short for "Yet
Another Ruby VM"). Y...
Difference between scaling horizontally and vertically for databases [closed]
... involves downtime.
In-Memory Data Grids such as GigaSpaces XAP, Coherence etc.. are often optimized for both horizontal and vertical scaling simply because they're not bound to disk. Horizontal-scaling through partitioning and vertical-scaling through multi-core support.
You can read more on this s...
Allow user to set up an SSH tunnel, but nothing else
... may be tunneling, without an interactive shell, to set that shell in /etc/passwd to /usr/bin/tunnel_shell.
Just create the executable file /usr/bin/tunnel_shell with an infinite loop.
#!/bin/bash
trap '' 2 20 24
clear
echo -e "\r\n\033[32mSSH tunnel started, shell disabled by the system administr...
Using Java with Nvidia GPUs (CUDA)
...example could be when many complex trigonometric computations (sine/cosine etc) are performed on "few" data elements.
As a rule of thumb: You can assume that reading/writing one data element from the "main" GPU memory has a latency of about 500 instructions....
Therefore, another key point for th...
opengl: glFlush() vs. glFinish()
...appropriate non-OpenGL APIs (e.g. reads from the framebuffer, screenshots, etc...). Whether that is really what happens is driver-dependent. The specification allows a ton of latitude as to what is legal.
share
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Get program execution time in the shell
...bash
START=$(date +%s)
# do something
# start your script work here
ls -R /etc > /tmp/x
rm -f /tmp/x
# your logic ends here
END=$(date +%s)
DIFF=$(( $END - $START ))
echo "It took $DIFF seconds"
share
|
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How many system resources will be held for keeping 1,000,000 websocket open? [closed]
...al info on how the kernel was tuned? max file descriptors/tcp window sizes etc?
– quixver
Jun 21 '14 at 21:14
15
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Maven: how to do parallel builds?
...alik Yes, exactly, 3 threads on dual core, 6 threads on quad core systems, etc.
– t0r0X
Aug 6 '14 at 11:25
1
...
How to find out the number of CPUs using python
I want to know the number of CPUs on the local machine using Python. The result should be user/real as output by time(1) when called with an optimally scaling userspace-only program.
...
地图组件（高德地图） · App Inventor 2 中文网
...标。
此功能的可用性和准确性取决于用户是否启用了定位服务以及可用的位置提供商。
用户纬度
如果启用了显示用户位置，则返回用户的纬度。
用户经度
如果启用了显示用户位置，则返回用户的经度。
可见性
...