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How to check if PHP array is associative or sequential?
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I think this would avoid a lot of potential cpu time and memory if one would check if isset($arr[0]) is false before extracting all the keys as is it clearly associative if the array is not empty but has no element in 0 position. As "most" real associative arrays have ...
Can I Replace Apache with Node.js?
...than when data is copied through "user land", but it ends up utilizing the CPU and RAM less, thus being able to handle larger number of connections than the classic way.
The link: https://gist.github.com/1350901
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Is GridFS fast and reliable enough for production?
...und 25k visitors per day). The server hasn't much ram, 2gigs, and even the cpu isn't really fast (Core 2 duo 1.8Ghz) but the server has plenty storage space : 10Tb (sata) in raid 0 configuration. The job the server is doing is very simple:
Each product on our price-comparer has an image (there are ...
How is TeamViewer so fast?
...y good implementation of x264 you get much better results with TV at lower CPU load. AnyDesk and Chrome Remote Desk use libvpx, which isn't as good as x264 (optimization and video quality wise).
However, I don't think TeamView can beat microsoft's RDP. To me it's the best, however it works between ...
Is System.nanoTime() completely useless?
..., on x86 systems, Java's System.nanoTime() returns the time value using a CPU specific counter. Now consider the following case I use to measure time of a call:
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总结const_cast、static_cast、dynamic_cast、reinterpret_cast - C/C++ - ...
...至它即便不是一个CDerived你也可以这样做。
当然，这个问题只在如果你做了多继承时发生。在你将CDerived转换 到 CBaseX时static_cast<> 和 reinterpret_cast<>是没有区别的。
情况3：void*之间的向前和向后转换
因为任何指针可以被转...
How to start two threads at “exactly” the same time
...on the synchronization techniques you use and of course having more than 1 cpu or core.
– ChaosPandion
Jul 31 '10 at 3:05
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arrayfun can be significantly slower than an explicit loop in matlab. Why?
...s as fast as the fully vectorized version... That was all done on a single CPU. Results for Soln5 and Soln7 do not change if I switch to 2 cores - In Soln5 I would have to use a parfor to get it parallelized. Forget about speedup... Soln7 does not run in parallel because arrayfun does not run in pa...
Canary release strategy vs. Blue/Green
...to get an idea of how new version will perform (integrate with other apps, CPU, memory, disk usage, etc).
Blue/Green:
It is more about the predictable release with zero downtime deployment.
Easy rollbacks in case of failure.
Completely automated deployment process
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MySQL vs MongoDB 1000 reads
...SQL & MongoDB in GOLANG1.6 & PHP5
system used for benchmark: DELL cpu i5 4th gen 1.70Ghz * 4 ram 4GB GPU ram 2GB
Speed comparison of RDBMS vs NoSQL for INSERT, SELECT, UPDATE, DELETE executing different number of rows 10,100,1000,10000,100000,1000000
Language used to execute is: PHP5 &...