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Difference between string and text in rails?
... increased storage space when using the blank-padded type, and a few extra CPU cycles to check the length when storing into a length-constrained column. While character(n) has performance advantages in some other database systems, there is no such advantage in PostgreSQL; in fact character(n) is usu...
When does System.gc() do something?
...generations in a multi-generational heap), then it can actually cause MORE cpu cycles to be consumed than necessary.
In some cases, it may make sense to suggest to the VM that it do a full collection NOW as you may know the application will be sitting idle for the next few minutes before heavy lift...
Progress indicator during pandas operations
..., njobs=-1, **kwargs):
if njobs == -1:
njobs = multiprocessing.cpu_count()
pool = multiprocessing.Pool(processes=njobs)
try:
splits = np.array_split(df[subset], njobs)
except ValueError:
splits = np.array_split(df, njobs)
pool_data = [(split_ind, df_spli...
婚庆O2O：领跑的企业也就只走到B轮 - 资讯 - 清泛网 - 专注C/C++及内核技术
...意思，很好玩？然并卵，怎么赚钱呐？如果不能解决这个问题，能叫商业创业吗？又不是过家家，自己嗨就行。当然如果只是闲着没事儿，想为爱晒幸福、秀恩爱的新人们多提供一些渠道，活着到也无妨。只是看你们撑的这么辛...
How to get the mouse position without events (without moving the mouse)?
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Actually, it is implementable without having to much CPU load (I think. I haven't been testing it). On dom ready build the <a> elements with javascript, take the mouse postion and then remove all <a> elements. On mousemouse you should have other function to take the...
How can I make a .NET Windows Forms application that only runs in the System Tray?
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Thread.Sleep is a bad idea: you'll end up using more CPU and battery than if you just did Application.Run like you're meant to.
– Sneftel
Jun 18 at 10:51
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Why should the “PIMPL” idiom be used? [duplicate]
...in headers. It takes about five minutes to compile (on a decent multi-core CPU), and just parsing the headers in an otherwise empty .cpp takes about a minute. So anyone using the library has to wait a couple of minutes every time they compile their code, which makes the development quite tedious. Ho...
Suppress warning CS1998: This async method lacks 'await'
...1709, Fall Creators Update] (10.0.16299.192)
Processor=Intel Core i5-2500K CPU 3.30GHz (Sandy Bridge), ProcessorCount=4
Frequency=3233537 Hz, Resolution=309.2589 ns, Timer=TSC
.NET Core SDK=2.1.2
[Host] : .NET Core 2.0.3 (Framework 4.6.25815.02), 64bit RyuJIT
Clr : .NET Framework 4.7 (CLR 4.0...
What are the most common naming conventions in C?
...ou are working on embedded project and you have 1024 bytes of RAM and 8MHz CPU.
– Kamil
Apr 23 '19 at 15:38
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show 2 more comments
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iTextSharp - Sending in-memory pdf in an email attachment
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It's not. It's a waste of memory and CPU time because the bytes have to be copied from one to the other.
– Serguei Fedorov
Jun 4 '15 at 21:09
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