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unsigned int vs. size_t
...2 (byte). 16 bit arithmetic was faster than 32 bit arithmetic, though the CPU could handle a (logical) memory space of up to 4 GiB.
Use the int type only when you care about efficiency as its actual precision depends strongly on both compiler options and machine architecture. In particular the C ...
What's the difference between Task.Start/Wait and Async/Await?
...e another thread is doing the work, and that thread has been assigned to a CPU, so the work is actually being done. Maybe the work is being done by hardware and there is no thread at all. But surely, you say, there must be some thread in the hardware. No. Hardware exists below the level of thread...
Grepping a huge file (80GB) any way to speed it up?
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If you have a multicore CPU, I would really recommend GNU parallel. To grep a big file in parallel use:
< eightygigsfile.sql parallel --pipe grep -i -C 5 'db_pd.Clients'
Depending on your disks and CPUs it may be faster to read larger blocks:
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App Inventor 2 SQLite 拓展：超流行兼容主流SQL语法的迷你本地数据库引擎 ...
...不需要回复的可留空~ 请描述您的问题（300字以内）： 给个鼓励也行呐~o~ 提供截图（仅截取当前可视区域...
How do I create a unique constraint that also allows nulls?
...onal disk space.
Note that if you don't want an index, you can still save CPU by making the expression be precalculated to disk by adding the keyword PERSISTED to the end of the column expression definition.
In SQL Server 2008 and up, definitely use the filtered solution instead if you possibly ca...
Should I instantiate instance variables on declaration or in the constructor?
...ow it was him). Personal taste is personal taste; ultimately, neither the CPU nor the JRE care about syntactical style.
– Aquarelle
Sep 20 '13 at 22:38
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How do I automatically update a timestamp in PostgreSQL
... Says so in the Postgres documentation of the types. Varchar has extra CPU cycles to check for the constraint, which doesn't happen on TEXT.
– Rahly
Jun 21 '17 at 15:50
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How to destroy an object?
...for "speed", but if you want to reclaim memory immediately (at the cost of CPU) should want to use null.
Like others mentioned, setting to null doesn't mean everything is reclaimed, you can have shared memory (uncloned) objects that will prevent destruction of the object. Moreover, like others h...
What is non-blocking or asynchronous I/O in Node.js?
...ng, asynchronous operations is that you can maximize the usage of a single CPU as well as memory.
Synchronous, blocking example
An example of synchronous, blocking operations is how some web servers like ones in Java or PHP handle IO or network requests. If your code reads from a file or the datab...
Function to calculate distance between two coordinates
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这个问题问了JavaScript的答案。. You have to convert it to english :)
– VulfCompressor
Oct 12 '15 at 15:56
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