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多媒体组件 · App Inventor 2 中文网
...全就是杂乱的，不知是不是因为版本过旧，还是其他设置问题，经过一系列尝试（包括设置文本朗读器的国家及语言属性）仍然是不行的。最终只得选择“Google文字转语言引擎”（语音设置为”中文“），中文朗读的效果也非常...
What's the difference between size_t and int in C++?
... whose Huge memory mode had 20-bit addresses stored in 32 bits on a 16-bit CPU (but which could support the 32-bit instruction set of the 80386); the Motorola 68000 had a 16-bit ALU with 32-bit registers and addresses; there were IBM mainframes with 15-bit, 24-bit or 31-bit addresses. You also stil...
Array.Copy vs Buffer.BlockCopy
...ood performance is almost surely due to locality of reference exploited by CPU L1/L2/L3 memory caching in conjunction with no method call overhead.
For double buffers on 32-bit machines only: The explicit loop copy routine is better than both alternatives for all buffer sizes tested up to 100k. Th...
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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What REALLY happens when you don't free after malloc?
...space are simply released. By contrast, a series of free() calls will burn CPU time and can result in disk paging operations, cache misses, and cache evictions.
Regarding the possiblility of future code reuse justifing the certainty of pointless ops: that's a consideration but it's arguably not th...
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 ...
What does a Ajax call response like 'for (;;); { json data }' mean? [duplicate]
...vaScript console to run that code in a tab if you want, and then watch the CPU-usage in the task manager go through the roof until the browser kills the tab).
So I suspect that maybe it is being put there to frustrate anyone attempting to parse the response using eval or any other technique that ...
Generate random numbers using C++11 random library
...gy doesn't work here because std::vector is actually a good default due to CPU caching. It even outperforms std::list for insertion in the middle. That's true even if you do understand all the containers and could make an informed decision based on algorithmic complexity.
– voi...
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 ...
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...