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MongoDB: Is it possible to make a case-insensitive query?
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Even with small datasets, it's not very efficient. You take a far bigger cpu hit than your query warrants, which could become an issue if you are trying to achieve scale.
As an alternative, you can store an uppercase copy and search against that. For instance, I have a User table that has a user...
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 repeat a string a variable number of times in C++?
...han copying many small blocks? I can think of branch prediction. Regarding CPU cache I am unsure which variant is preferred.
– Florian Kaufmann
Jan 21 '16 at 7:42
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Iterating through a Collection, avoiding ConcurrentModificationException when removing objects in a
...e type-safety of the for-each loop at the cost of increased memory use and cpu time (shouldn't be a huge problem unless you have really, really big lists or a really old computer)
public static void main(String[] args)
{
Collection<Integer> l = new ArrayList<Integer>();
Collecti...
Examples of Algorithms which has O(1), O(n log n) and O(log n) complexities
... steps for some constant k. It is not really important whether "steps" are CPU cycles, assembly instructions, or (simple) C operations. That details is hidden by the constant k.
– Igor ostrovsky
Oct 20 '09 at 5:44
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What is difference between monolithic and micro kernel?
...:- Traditional Unix
2.Micro Kernel :few
few services(Memory management ,CPU management,IPC etc) from core kernel, other services(File management,I/O management. etc.) from different layers/component
Split Approach [Some services is in privileged(kernel) mode and some are in Normal(user) mode]
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Should I commit or rollback a read transaction?
... done via COMMIT or ROLLBACK. There might be a insignificant difference in CPU time spent - a COMMIT is probably faster to parse than a ROLLBACK (two characters less) and other minor differences. Obviously, this is only true for read-only operations!
Totally not asked for: another programmer who mi...
Is there a combination of “LIKE” and “IN” in SQL?
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True. But regular expressions burn CPU like crazy, not I/O. If it is worse and how much worse it is, depends on how large your list of expressions is and whether the column is indexed or not, among others. It is just a warning, so that the original poster is n...
CoInitialize浅析一 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...作都在当前线程内部进行，因此也就不存在多线程同步的问题；而对于一些全局信息的修改则都进行了保护。
CoInitialize 浅析
FFMPEG (libx264) “height not divisible by 2”
...d significant slowness (you can check the ffmpeg log and if it shows using cpu capabilties: none! then that's bad). I'm not sure why they added that, but I'm not an Android developer.
– llogan
Nov 30 '17 at 21:37
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