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What is an OS kernel ? How does it differ from an operating system? [closed]
...le applications to effectively share the hardware by controlling access to CPU, memory, disk I/O, and networking.
An operating system is the kernel plus applications that enable users to get something done (i.e compiler, text editor, window manager, etc).
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How can I shuffle the lines of a text file on the Unix command line or in a shell script?
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Here is a first try that's easy on the coder but hard on the CPU which prepends a random number to each line, sorts them and then strips the random number from each line. In effect, the lines are sorted randomly:
cat myfile | awk 'BEGIN{srand();}{print rand()"\t"$0}' | sort -k1 -n | c...
When someone writes a new programming language, what do they write it IN?
...ach instruction in the language corresponds to a single instruction to the CPU. Its very low level language and extremely verbose and very labor intensive to write in.
But even writing assembly language requires a program called an assembler to convert the assembly language into "machine language"....
Animated GIF in IE stopping
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spin.js unfortunately is quite CPU intensive. See issues/8, issues/200, issues/215
– user247702
Aug 13 '15 at 14:00
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In Clojure, when should I use a vector over a list, and the other way around?
...t both ends a list is a pretty terrible choice. A deque is much better (in CPU and especially memory). Try github.com/pjstadig/deque-clojure
– boxed
Dec 24 '13 at 10:00
2
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Why does Java's hashCode() in String use 31 as a multiplier?
... I think the choice of 31 is rather unfortunate. Sure, it might save a few CPU cycles on old machines, but you have hash collisions already on short ascii strings like "@ and #! , or Ca and DB . This does not happen if you choose, for instance, 1327144003, or at least 524287 which also allows bitsh...
What is the difference between mutex and critical section?
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@TroyHoward try forcing your CPU to run at 100% all the time and see if INFINITE works better. The power strategy can take as long as 40ms on my machine (Dell XPS-8700) to crawl back up to full speed after it decides to slow down, which it may not do if ...
When would I use XML instead of SQL? [closed]
...nt of time. This only could be worked around with a costy (in the terms of CPU time) prebuffering with huge memory requirements.
– mg30rg
Nov 28 '13 at 8:43
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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...
Joins are for lazy people?
...out joins. BUT in many cases, your development time is more important than CPU time and memory. Give up a little performance and enjoy your life. Don't waste your time for little little performance. And tell him "Why don't you make a straight highway from your place to your office?"
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